I do not believe homosexuality is a choice and I have no doubt that many if not most homosexuals would push the button (if one existed) that could make their sexual orientation "normal." But it doesn't, and they can't.
Whether or not it is a choice is debatable. My opinion is, that for at least some, it is, and for most it is a condition resulting from some form of psychological trauma, or at least some form of neglect (absentee father, abuse, etc.)...........though I am far from an expert, and I don't tend to trust 'experts' anyway.
My view (from my admittedly Biblical perspective) is that it is a wrong behavior, and that we
all have wrong tendencies which we need to fight. As a kid, I had a bad temper and a strong urge to lie and steal. Those were my 'natural' behaviors. But as I try to improve my behavior, I fight those natural urges to do things that are not acceptable, nor right. I cannot say, "I was born this way," (though I was), and excuse wrong behavior.
There are many, many homosexuals who have that same perspective and try to get out of the homosexual lifestyle, which for the most part (their words, not mine) is very promiscuous. Many, over the centuries, have fought their inclinations (no matter where they came from), because they knew they were wrong. Some, through the grace of God, have been successful.
I don't believe for a minute the zeitgeist emanating from the left that our individual behaviors don't matter to society as a whole, and I see conservatives' arguing that 'it doesn't matter,' as a ramification of a very successful campaign by the left to convince people that, in the words of Cole Porter, "anything goes."