For those of you who are troubled by questions of representation and diversity in your writing..
Stop what you're doing, take a deep breath and read this:
This subject is the Catch 22 of writing in the the 21st century, and that's why I have a lot to say. It's the major reason why prospective novelists [including myself] have these concerns about "causing offense." Offense being, of course, not just a few bad reviews - those will happen no matter what - but an outcry due to some bit or other of the novel that is not necessarily ethical, sensitive or politically correct. As a writer, it is beneficial to generally be aware of ethics, but that does not mean that someone must write an ethical novel. If art imitates life, then in the realm of writing, there really should not be a question of ethics to begin with, because how ethical is the world today, truly? The decisions an author makes for the story, conscious or subconscious, not only reflect the author but also the state of the life around the author. Those who blame the author for having "too much bad stuff" in the novel are clearly not the author's target audience, for the state of life around these people does not reflect or resonate with them.
If there is a person who, for any reason, says you, the writer, cannot write the story you want to write, it's in your best interest as a writer to cut that person out of your life. If you listen to them, their toxic words will weigh you down. Otherwise, you may listen to those who might have issues with this novel on two conditions:
1. ...if their arguments are sound.
Why sound arguments? Unfortunately, there are those who like to draw attention to themselves by criticizing others or generally nay-saying whatever they come into contact with that does not fit their cookie-cutter image of "literature." Then, there are those types who enjoy the idea of band-wagoning onto nay-sayers, causing a mob effect. Anyone who doesn't take time and effort to examine the work itself and gives reasons why they feel the novel could be better in their review of it cannot possibly have the novel's or the author's best interest in mind.
2. ...after the first manuscript is finished.
Why after? You need to write the story first before anyone has any opportunity to sway you otherwise.
I questioned myself in the middle of writing the first manuscript. Results were not good - I hit a wall with my writing, worrying myself into a corner. I am a writer who happens to be female but, for reasons I can only guess at, have a tendency to I knew the story I wanted to tell would have a male-centric cast and that I could not change the perspective character's gender to female without changing that character's occupation, motivations and much of the early plot - essentially making the character and story into different animals - because that character happened to be what I call a "rule character." Wavering between an Everyman and a Goody-two-shoes, the rule character falls in line with what is expected of that particular character's role in the setting.
What I hadn't realized during this crisis was that part of the journey of this perspective character involves becoming a "rule-breaker," someone who steps out of the norms within their given setting in order to do the things that must be done. As I was explaining to other writers why I felt this particular character's demographic construction has to remain this way, I gradually realized that the "static" parts of his demographic were far less important to the story itself than the changes the character undergoes. These changes are a crucial part of the character's development and come about because of the shift from the situation he's in at the beginning of the novel to the situation he creates at the end. If I were to create a different situation, the story ultimately takes a different direction. These differences are not bad, per se, they just aren't what I want to write right now.
The catch 22 is that you may feel you need representation of a particular state of life that you may not be familiar with, but at the same time are concerned that you may not be able to represent that state of life in a manner that is genuine and empathetic to the audience. This is a valid concern. But it's one that should come secondary to the quality of the narrative itself. A poor representation is worse than no representation, as it's easier to show additional perspectives of life than it is to fix a two-dimensional perspective. The better resources on writing non-standard representation in literature stress the importance of a well-done representation and tend to attempt to council before they judge.
In my experience as a writer and reader, the first step to fine literature begins in the creation of the pieces with which the narrative is comprised. First decide upon a concept, then see what themes come of illustrating that concept. First make a good character, then assign said character a particular demographic. First build a vibrant world, then decide how that world treats your various characters, whether they are "rule characters" or "rule-breakers." With the good foundation of a fleshed out manuscript at your back, you'll spend less time second-guessing yourself and dedicate more time to improving the manuscript on all fronts.
Sometimes you just want to write about cute fluffy white bunnies, and that's okay - there is an audience for that. You shouldn't worry about whether your audience will turn against you, but you may want to open up a possibility for greater variation in the story. What is important is that you let the readers know that while you are writing primarily about fluffy white kitties now, the semi-fluffy calico kitties, short-haired black kitties and orange tabby kitties are just as important to you as a writer. Their stories are the stories you can hint about in the first book or plan to write in the future.* And if for some reason you don't get around to these other stories, that's alright. Those readers who genuinely enjoy the world you've created and shared with them will carry the torch for you.
*I ended up using both options of this solution and it has improved my cast of secondary characters dramatically. Just as there's more than one way to eat a Reese's cup or an Oreo cookie, my solution isn't the only one out there.