I don't know where you get this idea from? Where does it say that schools are teaching kids to act socially mature without understanding why?
Mindfulness if taught well should provide the opposite. It gives you a framework to understand your thoughts and emotions and act in a more rational, thoughtful way. It's not a way of abdicating responsibility - just the opposite.
Maturation is a process one learns by experience. Faking the result skips the reasons. Granted it makes people more palatable to be around but the lessons why are lost.
Mindfulness if taught well should provide the opposite. It gives you a framework to understand your thoughts and emotions and act in a more rational, thoughtful way. It's not a way of abdicating responsibility - just the opposite.