It doesn't matter either way - for all practical purposes, LSD causes psychosis to a small part of the population. Some of these people will develop psychosis w

It doesn't matter either way - for all practical purposes, LSD causes psychosis to a small part of the population. Some of these people will develop psychosis without LSD, of course, but some will not. Similarly, peanuts may kill some small part of the populations, fava beans a different part. They may die anyway independent of peanuts or fava beans. That's not a reason to ban them outright - rather, it's a reason to do the proper research to try to figure out who is susceptible and warn them.