The issue is this shouldn’t have happened in the first place. We as a society should have learned from, at least, the debacle that was leaded gasoline and its impact on populations over generations.
I'm not sure what you mean. What would the alternative world look like in this case? Less safe / a lack of tires until we confirm every chemical used isn't dangerous? I don't think that's a good trade off. We still don't have good alternatives in 2023, let alone in the last 100 years.
And DDT, and mercury thermometers, and Teflon, and the list goes on...
It's a fundamental fact: introducing anything new to an environment disrupts the status quo. In a living environment, that means health problems for living things. You either stop creating synthetic materials or you have unforeseen consequences. You can mandate more research and more rigorous standards, but that has diminishing returns. Some things will slip past.