Fishermen aren't supposed to fish with lead weights any more. Consumer electronics are increasingly lead-free. Bad for the environment, children's brains, and so on. Not hard to understand.
So why is it still legal to haphazardly smash a blob of lead to the rim of a poorly-made car tire, in the full knowledge that it is likely to come flying off at some point, be pulverized by passing cars, and end up in stormwater, as dust in children's lungs, and so on?
What is the great social benefit from putting these weights on car wheels? AFAIK, basically nothing happens to the car when these weights fall off, and wheels that are slightly above completely crappy can't even have these weights put on them. Why do we tolerate this nonsense?