Lots of parents drop their kids on their heads by accident. Doesn't mean the brats get hurt, or that they need protection from their parents.
[the worst analogy ever but hijikata is firm on the fact that his analogies are perfect]
Oi, oi, you're never going to be able to protect everyone in a given society, yeah? Here, there, anywhere. You take one countermeasure, and another problem will pop up. I guarantee it.