I mean they had absolutely zero reason to suspect they had any kind of underlying mental health issues, then out of nowhere they had a long psychotic episode an

I mean they had absolutely zero reason to suspect they had any kind of underlying mental health issues, then out of nowhere they had a long psychotic episode and never really recovered, and are now medicated permanently, frequently relapsing into delusion and paranoia. These are proper diagnosed cases, and they are now legally classified as disabled. The first time it happened, my step-father jumped into a river to "escape capture by aliens". Had a family member not swam out to him, he'd have drowned. Likewise, he totalled a car with others in it during a psychotic episode. Again, he shouldn't have been allowed to drive, but the laws at the time did not prevent him from doing so.