Real-Brisker:
Besides for Dina D’Malchusa, there is also an inyan of Naval Birshus Hatorah.
The Torah never condoned ABUSE of any type.
It’s tzedreiter logic to say, “If this is the proper way to be machanch kids, I dont think the non-jewish law should stop us”. There is a reason why Rav wolbe and others wrote and gave speeches on the proper interaction with children in the realm of chinuch.
The Mishnayos in Avos dictate what personality types should NOT be involved in chinuch.