> Some even believe that there are only two genders!

i.e. almost everyone a few years ago. Worldwide, most people still don't think there can be more than two sexes.

Sex and gender are different, though. Sexologist John Money came up with the idea of using the then purely grammatical term 'gender' to describe how people presented themselves.

So originally people's gender expression was more or less just advertising their sex roles for mating. Now it's more of a lifestyle/aesthetic thing with huge amounts of variation that aren't really anchored to biological sex in any meaningful way except insofar as they adopt the aesthetics of one of the biological sexes.

Indeed; people in the tech community often think of themselves as somehow especially rational, and sometimes as hyper-logical with reduced biases, but that's just the tech community's particular self-delusion. The tech community contains the full spectrum just like every other.

Do the rational tech people believe the science of gametes or do they put their faith in a different belief on how gender works?

This argument relies entirely on the (almost always intentional) misunderstanding that sex is the same as gender or its social expression.

They differentiate between biological sex (which is also more complex when considered in full) from gender. It's quite simple really.

There aren't any rational tech people; just tech people who believe they are free of bias.

The rational answers to both these questions is to accept we don't know (whether a fetus has a soul or how many genders) and stop trying to force whatever unproven answer we personally prefer onto everyone else. If you don't believe in abortion, don't get one. If you think there are 2 genders, pick from those. But don't act like you have some concrete proof you're right when you don't...

That falls apart when: 1. You believe abortion is the act of taking someone else's life. 2. You try to dictate other people's speech to acknowledge there are more than 2 genders when the person you are telling doesn't believe it.

Seems weird that you would frame it in a 1 sided way.

Who cares what you believe? Scientific fact/consensus says you're wrong.