Nonsense. Strawman.

First, your Dawkinsian reductionism conveniently ignores the massive role of epigenetics in sexual development. (Notice, I said development. I am not referring to mere genes and gametes serving procreation. Sexual development and behavior is not designed solely for linear procreation, and serves species survival and lineage in myriad ways.)

Second, reams of evidence show that there is a broad range of physical development in which nonbinary people fall somewhere between 1% and 5% of the population, and gay men and lesbian women comprise somewhere between 6% and 11%.

You are highlighting a tiny subset of those people so that you can pretend the other ones don’t exist.