because people are assholes
I mean , some people think it's funny to see not well informed people suffer/ die and then call that it's " survival of the smartest", but the thing is: If you have a fruit that you don't know, if someone tell it's poisonous it's common that you don't eat this, but if you already knew that it's not you will keep eating it.
I Don't know people are this kind of evil:/ like saying tha you can charge your phone on microwave
" But they sue it everyday they should know" yeah, there a a LOT of info in the world and I'm sure you din't know half of it ...
Other may came by fear on injections/ what was that inside... sometime medical error happens .. oh well :/