I will add a couple of real world first hand situations that have very good knowledge of related to experiences with lead. One was a fellow who painted cars indoors in his shop for a living just outside of New Market Va. His shop was located in his garage. His 4 year daughter lived in the bedroom located above the garage. She was fine and healthy until she wasn't. The fumes from the lead paint made it into her bedroom and she inhaled them every night. She got lead poisoning and essentially became autistic. She never got better. Needed full time nursing care.
The other person was a range instructor who volunteered to train incoming government contractors in Iraq after the invasion. Folks were flowing in left and right and they were not certified to carry sidearm and they had to be trained by the dozens. All the training was done underground with essentially no ventilation. He trained folks for 6 months every day. The students came in for a week. They were not affected in that short time, but he was. Got classic lead poisoning and received a full disability. The outcome is he had heavy metal in his body and there was no way to remediate it 100 percent. His thinking went to crap and he could not father children. I knew him before and after this happened. His world was gone.
The stuff is real. Now as the government always does is take things to extremes, and if everything looks like a nail, you just need a bigger hammer to make it work.