Listened to an interesting NPR story about pajamas.
Decades ago, some pajamas caught on fire. Kids died. So, the government required kids PJ'S to be fire resistant.
Manufacturers did so - by adding hazardous chemicals that soak into the skin. They didn't know this, however. It was only after studies that the problem was realized. So, the government banned those chemicals that they had encouraged.
Manufacturers switched to synthetics and other chemicals. However, children with sensitive skin can't wear them. They need untreated 100% cotton PJ's.
Which the government made illegal at the start of it.
A good anecdote for how regulations do not promote actual safety or higher quality of living.