Am I missing something here?

So, Britain has a new rule that prevents children from runnng in the playgrounds or playing football. But some of them carry knives and slaughter people they don't even know. What nitwit politicians are in charge here? Who makes up these utterly stupid rules?
"I think we shuold impòse a playground running ban, Frank"
"Why is that, Bob?"
"No room in the emergency rooms to treat broken bones."
"Why is that , Bob?"
"Full of diabetics."

There, rant over.