Women are never found in any army in Medieval societies in any context.
You're completely wrong in about 5 different ways, but here are some things in the game that aren't found in any medieval context, which have a far greater impact on the game than a few too many vaginas:
1. Recruiting soldiers from bakers
2. Levelling up soldiers by getting them to kill looters
3. Killing "looters" (i.e. completely naked )
4. All the armour and weapons. All of them.
5. The entire economic system.
6. The entire combat system.
7. The entire clan system.
8. The entire campaigning system.
9. The way siege assaults are conducted.
10. The way battles begin, are won, and how they look.
I could go on but you get the idea.
Whenever this same discussion happens I really get the impression that you either don't care or know much about history, you just have a very specific pop culture idea of the middle ages in your head and you get uncomfortable when that is broken. I don't blame you for this, most people are the same, but using history to back up your argument when the entire game is far more inaccurate is very weird, like mowing your lawn while your house burns down. If I wanted bannerlord to be a facsimile of medieval europe I would actually agree with you here, but it clearly isn't, and never will be at this rate.