[@Andreyich] 

Many scientists initially rejected quantum mechanics but as there is an emergent consensus on the subject based on experimental data, it is now overwhelmingly accepted. Vigorous debate exists regarding the minutia of even well established scientific concepts. That is how we refine knowledge. Changing your position as new experimental evidence becomes available is a feature, not a bug.

I applaud Bill Nye for using the social constructed term gender in a more nuanced way. He really should have said, your gamete production is according to a consensus of biologists who base this on experimental evidence and observation, determined by your chromosomes. But hey, its a fun meme.