Physical strength ties to our oppression
I believe that because women are physically less strong, we are considered more useless by default and are expected to compensate through servitude, perfection or obedience. Since we're smaller, people see us as less than, less competent, less worthy, less intelligent, less complex. That's what it all boils down to. People's ability to dominate, lift more, run faster, punch harder, extract resources, gain power faster... Since women can't do that as much as men and they're vulnerable via menstruation, etc., they're automatically delegated to the roles of either birthing or being a sidekick to the man. Since outside of pregnancy, men can do all the things women can and since women aren't as strong, they see us as less useful for other tasks. This mindset is the result of valuing conquest over community and children. This is one of the reasons why I will never date a man. They can all go fuck themselves. And this world that values dominance so much can go to hell too.