Longer yes, healthier... Hard to judge. We weeded out a dozen nasty things, but got others in return, for which "chemicals" might be an explanation. Parkinson's and Alzheimer's come to mind here.

We were smart enough to add lead to fuel, so I absolutely wouldn't be surprised if something we mindlessly use today is actually super unhealthy too. People often seem to suffer "End of History" syndrome when judging these things. "Yeah we were stupid back then but today's scientists are smart."

If people try to avoid processed food, products containing a lot of suspicious "chemicals", use the washer's program that does an extra rinse-run and whatnot I don't think that's entirely unjustified.