Chemistry sets packaged as consumer products are regulated, as are their constituent chemicals whether they're packaged for consumers or for industries. Meanwhile, parents and teenagers are more terrified of chemistry sets than those products actually deserve. As a result, there appear to be fewer incidents of chemistry set accidents than there were accidental ingestions of rare earth magnets. (It turns out the search term you're looking for here is [chemistry set poisoning]).

I feel like this kind of makes my case for me: Buckyballs was marketing a desk toy that turns out epidemiologically to be more dangerous to children than leaving a chemistry set unattended on a desk.