“Born that way” was never a good argument, in my view. Most of us, myself especially, were “born” selfish, self-centered and with the desire to benefit ourselves as fully as possible, with no regard for the “rights” of others. That’s why one of the words you hear from toddlers most is “mine.” As we grow older, we find out we are “born” to lie if it serves our immediate purpose, to steal if no one is looking, and to do all manner of things that give us pleasure. Do these tendencies make the behavior acceptable?
Of course not. We are taught not to take things from others, to tell the truth, to have good manners, etc. So some things we are “born” to do must not be done in order to fit into society.
Is being gay one of those things? THAT is a fair question; but to say that being gay is acceptable because one is “born that way” is a terribly weak argument.
It’s simply more evidence for the doctrine of original sin.