How can women be Christian?

[Pyrrho]

Maybe some people are not afraid of endorsing traditional gender roles.. After all it's work pretty well for what 5000 years or so..

Not having modern medicine worked for more than 5000 years, so why like modern medicine?  Why not prefer dying young, as most people did in the past?  Why not live without electricity and running water, like people did for many thousands of years?

apples and oranges sport.
Traditional male and female roles are sociological interactions not a matter of life and death or physical health. The only valid comparison you made is between old and something new. Because medicine and gender roles in the way you compared them share nothing else.

Your 'reasoning' in your post was simply that something has worked for society in the past.  And that exact same reasoning applies to all of the things I listed.  Society in the past worked without all of those things.  The point is, just because something worked in the past, that does not mean that such a thing is optimal or best.