you are playing with an imaginary toy in an imaginary sandbox. fandom is all about having fun and letting your imagination run wild. canon is only a suggestion, not a rule. how much of canon you will follow, if any, is entirely up to you.
please stop trying to apply rules on hobbies and something that’s supposed to be your comfort place and a form of self-care.
“is it okay if I think this” “is it okay if I imagine that” it’s YOUR little world that you create for yourself and your own enjoyment. you literally do not need strangers’ opinions or permission when it comes to a hobby that doesn’t harm or affect anybody in real life. again, it’s YOUR imagination, YOUR world, YOUR creation. you have all the power and the freedom to:
headcanon whatever you want, however you want
ship whatever you want, however you want
write whatever you want, however you want
draw whatever you want, however you want
create whatever you want, however you want
reject whatever you want, however you want
as long as you’re not harming anybody in real life, how you have fun with fictional characters and your imagination is no one’s business but your own’s.
last but not least: fiction is not, and will never be, a reflection of your real-life moral compass. what you like in fiction does not reflect who you are in real life as a person. kill that cop in your head.