Do napkin math on how much lead is actually in a 3d print. Then think about the exposure that actually translates to, since most of that is buried inside a print.

We're talking micrograms per kg with a brass nozzle, unless you're printing in an abrasive filament. Possibly less - nozzle wear with non-abrasive filaments is very minor. If you're using a steel nozzle... Well, besides the fact that your steel nozzle probably doesn't contain lead, you're looking at an order of magnitude less wear or better.

Or, look at https://pmc.ncbi.nlm.nih.gov/articles/PMC6530847/ for a worst case scenario.

Lead in 3d prints is not just overblown, but a total non-issue outside of a laboratory context.