From Wikipedia:
"Drugs whose use, abuse, or withdrawal are implicated in psychosis include the following:
....
(LSD and others)
...."
This says nothing about predisposition.
Follow the sources, best advise ever, the source of the source will often be something out of context or misunderstood.
Look into the case for the popular LSD psychosis myth (ie LSD only harms the ill). It had arisen from the fact that LSD studies before 1960 involved psychiatric patients.
It is plain that the incidence of psychosis among psychiatric patients was higher than other studies of normal participants; however, consider the follow-up of hospitalized psychiatric patients compared with
voluntary normal participants. Knowing that if you become psychotic you are
not compelled to voluntarily seek treatment, while pre-hospitalized meant being evaluated constantly.
Also, being a psychiatric patient did not mean you were predisposed to psychosis.
Granted, LSD probably does trigger mental disorder events for people with schizophrenia etc. but it in no way requires a disorder.
Erowid will deny the LSD culpable risk by citing for example
Vardy 1983 or
Tsuang 1982, but if you actually read these and understand them, what they actually found was that drug-induced psychosis was distinguishable from schizophrenia and that drug abusers (DA) and drug abusers with psychosis (DAP) shared clinical features and family history (no difference). They also found the risk of suicide was the same and the short-term psychosis should be treated with anti-psychotic medicine, ie a true psychosis. Also there wasa correlation between alcohol parents and LSD induced psychosis, we'll get back to that later.
What you will find, as with
Malmberg 1998 is that the odds of predicting vulnerability are not good. How could anyone, especially in people from studies conducted before 1960, predict if they had been predisposed? It makes no sense.
I would guess that finding children of alcoholics prevalent among LSD psychotics indicated children of alcoholics are simply prone to abusing drugs, and that abusing LSD is giving them psychosis.