Don't take that is an indicator, Haruki Murakami often reads similarly and he seems to be a well adjusted person.
Murakami's main schtick, I realized, is to write in the style of a hard-boiled detective novel, like Raymond Chandler (who he has often cited as an influence / obsession)... except that instead of the protagonist being a literal private investigator who wanders the city and meets people to solve the mystery of a murder, it's a disconnected man who wanders the city solving a mystery that's like, how to connect with people or how to get over a sense of loss or something. The world is mysterious, like how in a detective novel with corruption and intrigue and stuff, but it feels like it's that way because of how mysterious human connection is to his protagonists.
Philip K Dick, on the other hand, writes a mysterious world that makes some paranoid idea he had actually real. They're superficially similar but, I think, not really actually coming from the same place at all.
Dick's writing was obviously a byproduct of his mental state. That's where writing comes from. Just because someone else made similar works in a different mental state doesn't invalidate that.