I want to be careful here. The discussion as it is going has been good and respectful, and for that I am happy.
In Vancouver BC where I met my wife, the population of the west end is at least 50% if not more, gay. I have had and continue to have many friends that are gay (We now live in a University town where diversity, both racial and sexual, is accepted and commonplace).
I find that people are people. I have met as many obnoxious gay people as I have straight folk, and as many decent ones as well. I really don't believe it is a matter of choice for folks. I often think about how hard it was for me to meet the right person to spend the rest of my life with, I can only imagine how hard it must be for people who identify with such smaller segments of society.
What Jenner did was brave, and can never take away what he has accomplished in his Olympic days. "Hero" is a little over the top, but is he brave, IMHO, yes.