Why don't more RPGs allow you to get dismembered and prosthetic limbs?

[Tweed]

Although Kenshi is cool, i don't like how they made the prosthetics potentially BETTER than your limbs.
Some dudes i watched started doing some real degenerate **** where they'd intentionally let their guys get captured by fogmen, tied up and slowly eaten until their limbs come off, bonk the fogmen and heal their guy, bring them back and let them heal for days in a bed. All so he could replace his limbs with 'da meta prosthetics'.
The whole 'the flesh is weak' ******** *** mindset

Was very offputting

That's terribly offputting!

There's a much more efficient way to do this.

yeah i forgot about that, i think one of them used em as well

nasty stuff

If you live on fish island then you're pretty much guaranteed to lose limbs because crabs have a much higher rate of taking them off during combat. A lot of my guys lost an arm or a leg before we had harpoons set up. Strangely enough, my hiver prince starter never lost a single limb during the entire playthrough.