There's zero reason why in computer science and tech women and men should have so drastically different ratios. Even back in the day programming was seen as a women's job.

Zero reason?? More opportunity in other traditionally male jobs like doctors, nurse pay has increased, tech jobs require longer hours than they used to, the opening of various CS-parallel fields like UX/UI design that don't count as computer science, more economic freedom for top earning families to not require 2 incomes. There are literally dozens of reasons why women's interest in CS might decrease.

* - https://www.payscale.com/compensation-today/2020/05/for-nati...

> more economic freedom for top earning families to not require 2 incomes

Isn't this not actually true? More families are unable to avoid needing two incomes.

Nah. Do you know nurses? Their hours are pretty damn long and much more stressful. So longer hours does not sound like a valid reason why someone would choose one profession over another.

What ratio "should" they have then? What is the right ratio based on non-social causes, from which any deviation is evidence of bias or cultural sexism?