Earlier quoted context omitted.
There's no correlation, it can be a trigger, like giving birth can be a trigger. Let's make breeding illegal?
There is a correlation between people who develop serious mental illness and people who take LSD. The effect you are describing guarantees this (under very weak and sensible assumptions).
It apparently can bring out already dormant mental illnesses but is not in any way associated with the formation of new mental illnesses.
We all know LSD was literally available _at the pharmacy_ in the USA up until the mid 60s right? The entire nation didn't go insane... And you can bet your ass a pharmacy will at least ID people trying to buy it, you'll know exactly how much you're getting, and there could probably even be an information packet to go with it. Currently if you want it you have to risk persecution, have no idea what strength of dose you'll be receiving, and there's definitely no information packet unless you look it up yourself.
At the end of the day criminalization is causing more harm than it's solving. People have issues with all sorts of things, alcohol is a lot more negative but totally legal.
In general the proper tact is to ensure access to healthcare and opportunities in our society. Then those with dormant or non dormant mental illnesses are more likely to receive the attention they deserve. Access to opportunities means people get involved in their communities and projects and become passionate about something and are less likely to abuse drugs overall.
Or you can spread hogwash like "LSD makes ya insane" which is not directly what you said but how people will read it.