Well parents need to know if a coach knows what he is doing, i always taught how to protect yourself and how to not lead with your head etc when I was coaching kids, High School coaches may not teach that, many never played and are thrust into the roll in some areas, where other hire ex players. Assuming the coach knows what he is doing isn't wise. I don't know the circumstances of the above case, but I have seen a lot of guys put kids in bad situations because they don't know the right way to make contact offense or defensively.