I'm not a psychiatrist but have been around a lot of people with mental health issues. He likely has some type of autism that makes him very good at producing music. I know doctors like this. Very good at memorising illnesses and understanding the human body, but the way they socialise and think is really off. I suppose we need to learn to live with one another and accept these mental challenges and also not pay attention to the stuff that doesn't make sense. If we keep focusing on that not only will we make matter worse but we will also get frustrated. It's hard to balance dealing with these people. I myself am annoying AF but have told people that it's my ADHD and to tell me when I'm acting up. It's worked well so far.