Still wash your hands after using lead-free solder by the way. You don't want to be eating rosin or copper either.
And copper plumbing is super common for potable water?
And plenty of spirits are distilled in copper stills?
I mean, encouraging handwashing is fine but copper isn't what you need to worry about.
Lead is nothing like that. We don't need lead to survive, we shouldn't put lead in our bodies. Lead is also known to accumulate in your body (especially your brain). Avoid lead exposure as much as you can.