Of course you wouldn't.
We have journalists to uncover dangers like this; they are clearly financially incentivised to do so. We have courts to assess damages. We don't need government regulation.
Such a common trope that "the heartless capitalist doesn't care about harming customers so we need the government to save us". Of course the capitalist cares about harming customers, she needs to sell to them (and their competitors product will be much more successful if it is not harmful!).
And, in either case, regulation or free market will only save us if there are viable alternatives. Fossil fuels still kill people, but we don't regulate against it because there is currently no viable alternative.