no person who was born blind has ever been diagnosed with schizophrenia

re: deafness - here is a quote from the article:

Congenital blindness doesn’t seem to protect against any other mental illness, so it’s not a safeguard overall. Congenitally blind people have been reported to have had eating disorders and arachnophobia—a person can have those disorders without ever having seen their bodies or a spider). And if a person is born both deaf and blind, it doesn’t seem to offer protection either—that comes with higher risks for psychosis.

There’s a disease called Usher syndrome, in which people are born deaf and lose their vision early in childhood; it’s been associated with schizophrenia and psychosis. Silverstein said that it’s unclear why adding deafness to the mix removes the protection that blindness seems to offer. “One possibility is that blindness by itself presents a surmountable challenge to cope with the environment and thereby fosters compensatory sensory, perceptual, and cognitive changes that lead to a surprisingly high level of functioning,” Silverstain wrote in a 2013 paper. “Deafblindness, on the other hand, may so seriously restrict the opportunity for environmental interaction that it also stunts the development of cognitively based coping strategies.”

But how about commercial jet?

Is that beekeeper thing true, or is it a joke that I'm too dense to get?

Did you mean Einstein's son? Because he never had a brother (he did have a sister, but not a brother), but he did have a son (Edouard) with schizophrenia.