Famously, human beings never have children, who definitely do not explore the world around them through their mouths, and who definitely are not especially sens

Famously, human beings never have children, who definitely do not explore the world around them through their mouths, and who definitely are not especially sensitive to early lead exposure. Like, do you just deny the past century of brain damage from lead? It's physically measurable in our bodies. Where did that lead come from if it's so inert as to be safe?