The guy’s answer reads like a response most would have after being pestered about his or her rejection several times. If a transbian asked me out, I’d say “No” and move on. If I was asked why, I’d probably just say, “I’m not interested.” If bothered again, I’d be quite irritated but say something like, “I don’t like you like that.” If pestered a fourth time, I’d probably snap and come back with, “Because I’m fucking gay and I don’t like dudes at all. I don’t care what pronouns you use, I’ll never been into you.” I assume most people have a similar polite response limit and wouldn’t jump in at the snap level.