> He tried some LSD, which may have either activated and/or exacerbated schizophrenia in his brain.

Or perhaps being a latent schizophrenic, he was drawn to LSD/drugs in general. According to a study done in 2006[0] 90% of schizophrenics in the US used tobacco products in 2006, while only 20% of non-schizophrenic people did.

How do you explain this? It’s either “schizophrenic people use drugs at a higher rate” or “tobacco causes schizophrenia”. I’d bet heavily on the former.