Yep, I get that, but what should an open-minded company owner do? They can't exactly promise "you will all be here for 5 years, guaranteed, no matter what" too

Yep, I get that, but what should an open-minded company owner do? They can't exactly promise "you will all be here for 5 years, guaranteed, no matter what" too, because for most Homo Sapiens that's a signal to immediately become useless. My point is similar to yours: that the incentives are indeed not aligned, and that this is quite tragic because even when some people make an honest try to break the vicious cycle they still get treated like everyone else.