We always find out later. However, two of my 4 brothers never worried about anything. They were always smiling and happy. 🙂 Even when they had big problems.
Humans are not fragile. I’ve seen several murder cases on TV (forensic files) where one spouse periodically puts small amounts of arsenic in the other spouses food to make them appear to die of natural causes. And it takes a long time to kill them.
So, ever since I saw those murder stories, I don’t worry about pesticides or herbicides. Naturally I wouldn’t want to work in a factory producing those things, or a farmer or grounds keeper, or an exterminator, spraying it around.
Those are the people that should be studied. How long they lived, how did they die etc. I don’t even worry about asbestoses, paint sprays, lacquer thinner, adhesives, copper dust, aluminum dust, you name it, I don’t worry about it.
I spent many years in manufacturing buildings and breathed and wallowed everything you can think of. I know, “they” say this and that, but we don’t know who “they” are and why they say what they say.
Many authors exaggerate their stories to get attention. Even the weather reports are exaggerated, to get rating, when a storm is approaching.