At ~0km/h kids are unfortunately still dying, mainly being backed over by their own family. The rest of your argument is basically a slippery slope fallacy and

At ~0km/h kids are unfortunately still dying, mainly being backed over by their own family. The rest of your argument is basically a slippery slope fallacy and not even close to what's happening in any urban planning discussion I've ever been a part of. And I'm on the board of an organization discussing these things.