"Transgender only seems odd in modern times because Western society demands a binary of gender roles that our ancestors did not."

Just as running barefoot only seems odd in modern times because Western society has forgotten the marvelous running power of the human foot.

Barefoot running became quite the rage, what was it, a decade or more ago? Train barefoot, elite runners urged, and let your feet grow strong and do the job they're designed for. Don't interfere with your body's engineering.

Some runners began wearing lightweight shoes without support and cushioning, finding a compromise with the need to protect against sharp objects.

(Corporations adapted by selling expensive "low profile" running shoes, but I digress.)

I like your analogy, because runners have been learning that culture has interfered with them reaching their full potential – by making them bundle up their marvelously adapted feet.

I don't think anybody is sure from an evolutionary perspective why transgender traits have persisted for millennia, but they have. Just like the human foot has persisted as marvelously suited to long-distance running.

I know this isn't the point of your article, but maybe one important lesson is to stop fighting against our design. I'm not endorsing the "naturalistic fallacy" that anything in nature is good. I'm just suggesting we stop fighting against our full potential.