People need to stop saying "Being disabled isn't a bad thing", because they don't understand that they're pushing toxic positivity.
Being disabled can greatly affect someone's life for the worse, and make their quality of life poor, or outright keep them from doing things that most other people are capable of.
I can't see flashing lights, hankfully, I won't have seizures, but I will have terrible migraines. I can't be near loud, high pitched, or quickly repeating sounds, because I'll get a migraine. I can't be near string smells, because I'll get a migraine. I can't eat certain foods, because I'll get a migraine. I can't even cry, because, say it with me now, I'll get a migraine.
My sibling can't always use the stairs without help, because they have a neurological condition that can make it hard for them to walk. They sometimes can't walk at all and will literally crawl across the floor.
My mother can't have too much salt because her kidneys could literally fail on her from having too much sodium, due to a rare kidney disease. She has a higher chance of heart attacks, so she can't do certain activities or eat certain foods. She also has the exact same problem with migraines, she just has proper medicine for it, and she can manage it better.
My younger sibling can't handle loud noises, because they might have a meltdown, they can't handle seeing animals hurt or they might have a meltdown. They can't always read, because they can't always understand that there's a link between the symbol of a letter, and the sound that it makes. They can't even recognise people by faces, and have to rely on clothes, hairstyle, voice, etc (they will, hopefully, grow out of this as they get older, as face blindness is a common symptom of autism, that usually goes away by adulthood... But not always).
My mum's fiancé can't run, because his shins are literally made only of scar tissue. I'm not exaggerating, his shins are made entirely of scar tissue.
By the way, most of those are only considered "Quality of Life" issues. Some aren't even considered disabilities. My sibling who needs literal mobility aids can't get disability, because his neurologist doesn't believe in disability, unless you need another person or being (such as a guide animal) to literally keep you alive, cannot walk ever, need a prosthetic, or can't use your eyes and/or ears.
So, yeah, disability doesn't make you less of a person. You aren't bad or less worthy of love help, or happiness because you are disabled. Your quality of life, however, is not the same as other people, and is almost always worse.
Being disabled isn't some quirky treat that gives you perks in life, like skipping lines or parking closer to the door. It's not something that makes you useless, helpless, or less worthy of life, love, and happiness, either. It's incredibly difficult to understand, it's difficult to explain, and, honestly, I'm pretty sure I'm not even explaining it well right now.
I don't even think I can understand what it's like to be disabled in ways that I've not experienced. I can be empathetic about it, I can be sympathetic about it, but I cannot understand what it's like to need a cane, or to need a guide, or to have someone fully take care of me, because I cannot care for myself, I cannot understand what it's like to not hear. Those will never be things I understand, unless they happen to me. Not because I don't want to understand, but because I have not experienced it, and I need people to know that it's ok to not understand. The problem is when you don't accept, when you don't try to learn, and when you refuse to listen or help.