And, I will add, the only people for whom their sexual preference seems to be a choice are bisexuals, who are attracted to both sexes--but again, that seems to be primarily genetic.Except the thing is, homosexuality is not like the things you describe here. It's more like your eye colour - something you're born with through no choice of your own. People who are heterosexual didn't choose their sexuality either (as I think anyone who's ever been attracted to another human being would know). It just is what it is. It is part of who a person is. How could it not be? I don't understand people who would say that their heterosexuality was not a choice but that somehow others' homosexuality is a choice.
So if sin is a result of choice then people who are gay have not sinned, since they've made no choice. And let me just ask you a question. Up until fairly recently in human history the LGBT community has been treated pretty appallingly (and in some parts of the world, still are). Why on earth would anyone consciously choose to be gay knowing that you will certainly face a lifetime of persecution, marginalization, and even torture and death in some cases? It makes absolutely no sense unless it is something that an individual is born with.