The reality is that poison is dose dependent, and we’ve mostly identified all the dangerous things and their doses. That lead in the bottle and the formaldehyde in your cheap clothes is bad … but not in a way that will detectably cause you harm or impair your life
I'm pretty confident that thanks to us getting rid of a lot of stuff already (lead, etc), we're now more able to detect other stuff that is causing issues (like microplastics, although there was a lot less of that in the 70's)
