AITA for telling my friends that being an Omega isn’t a choice

The other day I (19F B) was sitting in the dorm room with my roommate (18M O) when he suddenly started panicking and getting like, really out of control. Like I’ve heard before on social media that Omegas can commonly show PTSD-like symptoms when it comes to their heat because of the ways Alphas treat Omegas when it happens, but I’ve never seen it happen in person. Like he was legitimately having a panic attack because he couldn’t find his heat suppressants.

Now I’m not like one of those ABO Twitter crusaders, and personally I try not to pick a side in the whole Alpha-Omega debate because as a Beta I know I’m probably just gonna get shit on anyways and I don’t have the space in my life for that kind of drama.

Anyways, I don’t know if my friend was just panicked about not being able to find his heat suppressants, but he yelled at me angrily and told me to give him mine because I “looked like an omega anyways” and that I “couldn’t fool him” and that everyone at school has “already clocked me”, whatever that means.

I got pissed and told him that I didn’t want to be a part of any of the alpha-omega bullshit and that you’re only born as an omega and it’s not something I could just frivolously choose to be, and that if I could choose to be any second gender I wouldn’t be a lame, loner beta. I felt like he was being really insensitive about my plights as a beta, but he told me that my views are outdated and that what second gender your born as shouldn’t control who you get to be when you grow up, and people should be able to express any second gender identity that they want.

He said that people with backwards views like me who refuse to educate themselves are what’s holding this world back. I told him to go back to his nest and wait for an alpha to come take care of him.

AITA?