I'm not sure what sort of point you're trying to make. The major risk of lead poisoning isn't death it's the many other serious negative health effects, especially on children's development. Is there a particular reason why we should ignore lead exposure in children at levels several times higher than the current EPA limits?

Moreover, if a simplistic analysis of deaths caused by "exposure" are to be used to guide policy then we should ban water first of all, along with buckets, gravity, and food.