Of course. If there was only a 1% lower chance of passing on the “gay genes” in each generation, it would effectively cease to exist in only a few dozen generations...
...which doesn’t even address how such a combination of genes would arise in the first place. What possible genetic advantage would it offer?
From a Darwinistic perspective, it makes no sense.
None. Evolution favors the exact opposite: the propagation of the species. If there was a queer gene, it would be dysgenic and die out within a generation unless the organism did something contrary to its nature.
Maybe this happened in human history a few times but there would be nothing widespread about it.