Sexual orientation does not affect ability to reproduce. You claim that it does, then suggest that that is changing. In fact sexual orientation affected reproduction much less before the 20th Century than it has in recent decades. The decline in procreation by same-sex-attraced individuals is recent and due to the construction of the "gay" identity and culture. Before the late 1800s, same-sex-attraced individuals almost always married and made babies in the usual way. Now people are choosing to make babies in other ways, from withing the gay community.

The culture war is in fact the only war. As left-handedness lost its moral - cultural - meaning as, it came to be seen as a trivial difference, not as something sinister. Would anyone take seriously the claim that left-handedness is a defect, disease or deficit - something that should be cured, corrected or suppressed? If someone were to make such a claim, seriously, how would we view him? As a kook? As a bigot? Worse? When people abort their female fetuses, as if being female is a defect, deficit or disease, what kind of moral - cultural - judgement should we/do we make of them? Only a cultural shift will drain gender and sexuality of their cultural values so that they can be seen for what they are: like handedness, mere differences among people that make the world a richer place.