I don’t think all gay men will agree to have anal sex (as a bottom).

I wonder if TIFs boundaries are lower than gay men’s because they think “that is what they should do” ?

Lots of gay men won't agree to be penetrated. So, yeah, het women larping as gay "men" will agree to it because that's the only way they can get occasional gay men (well, bi men calling themselves gay) to fuck them.