I believe that is a factor as well, but as far as representative of the gay population, I believe it is extremely small.
Stating all gays are ‘born that way’ is complete bs. I believe it to be a combination of factors. Since it is politically incorrect to even bring it up, we’ll never know the causes of being queer.
A genetic tag for homosexuality is the Holy Grail of the homosexual lobby. They want that to be true in the worst way, because it will excuse everything and put it in the same bucket with skin color and sex.