so in an equal society we'd expect them to make up a very slight majority of fortune 500 CEOs, congressional representatives, supreme court justices and presidents
Well that's a load of bullshit.
You're treating all of those things as if they were a lottery, and women simply weren't considered.
They're not. ANY OF THEM
Every one of those positions has an army of men competing to be the next one in the seat. Ignoring all of that because you feel like women should have made it is just stupid.
Here's the facts for you: Even with blatant discrimination in women's favor, they still don't get into all the "positions of power" people try to cheat them into because those positions often still require work women by and large choose not to do
Work like taking risks, or being in the public eye and taking responsibility for failures that may not be your fault. Both things women avoid at far greater rates then men.
Edit:
And to be very clear, i'm not saying women can't, I'm saying they don't, won't, and will continue not to, in anywhere near the numbers men do, simply due to their personal choices.
This is why the focus on 'equity' is so fucking toxic. It's basically saying "all power in society should be evenly distributed, i was able to twist data around enough that it i can show a way women have less (ignoring all ways in which men have less), and unless women have all power that men have in equal rates, it's sexism!" and most of the people who say this with a straight face know full well it's impossible and the purpose of framing it this way is so they can continue to advocate for free shit, in perpetuity