It's mostly that being online and being -phobic is my ~culture~ so to speak, I don't need a partner to be a super radicalized crazy person, but I've had multiple friendships end because the other person found out I'm a Farmer. I mean years-long deep friendships, not fair weather acquaintances. I don't want to go through that again, and I especially don't want to think I'm pairing up with a normie then 5 years down the line I'm a trans widow and they're cutting off their penis to spite Trump or some shit.
As far as our hobbies, he doesn't have to be my clone, he can like other things, but like... my ex "Ron," he was a film snob, and he hated my favorite movie. He would insult me for liking it and refused to watch it (he hadn't even seen it). I had to beg him to watch it with me if he was gonna shit on it, and he only agreed on the condition he could pause every so often to yell about how bad it was. Then he made a 20 minute Facebook video about why it was garbage and how he doesn't understand what I see in it, but it's okay because I'm cute.

Another time, a new episode of Steven Universe aired while I was at his house and I asked if we could watch it together. Even though he was the bigger SU fan, he sulked the whole time, played on his phone, then told me that me being there and laughing/being excited ruined the episode for him.
I don't need to marry a brony, but I don't want to date someone like Ron again. If he doesn't like what I like, I want him to at least be okay with me liking it and not make me feel bad for it.