A chosen Lifestyle that defys logic and works contrary to Creator God who doesn't make junk or flawed goods!
"A . . . Creator God who doesn't make junk or flawed goods!"
Then explain cancer --- DNA gone wrong.
I think it is possible that God would allow a "gay gene" to exist, just as He allows cancer, or tsunamis, or chemical imbalances in the brain, or whatever.
He puts "thorns" in our lives for us to overcome with His help (and for other reasons).
I would not be surprised if a "gay gene" exists so it can be overcome, just like cancer or alcoholism.