[dware]

they suffer paranoid delusions about radio waves being beamed into their brains, their thoughts being stolen by others, their food being poisoned, etc

Damn. They must be smoking that real good stuff. All crystal-encrusted and such.

[irishjuggler]

Not everyone is affected the same way. If you use the drug and never experience psychotic symptoms, congratulations and enjoy. Perhaps only a minority of weed users will cross the line into psychosis, but only a small minority of tobacco smokers will get lung cancer. That doesn’t means that a causal relationship is imaginary. Some reading material for you, if your mind is open...
https://www.brightquest.com/cannabis-induced-psychosis/psychotic-symptoms-in-marijuana-smokers/