I don't think it's a choice either. I knew my brother was gay before if did...Probably confused.
I've also seen the torment gay people go through by supporting. You would not believe how cruel people can be. Heck, even on elite I've gotten karma wishing my brother was DEAD. I stood by him when my Father and his wife disowned him. He deals with that kind of stuff daily. I've seen what his friends go through. No one would choose that road unless the were simply trying to be what they are.
Too much freaking judgemental hate in the world.