That blows my mind. People sometimes need support. Americans often have no family. I have a few folks to talk to, but they are all too busy to be worried about me. Isolationist cultures might need therapy more, but it certainly can't replace medical treatment.

Not sure if it's common in your country, but a family doctor here can prescribe meds for mental health issues. Psychosis can become extremely serious if untreated. If it's an option, the cousin could just tell his doc that he's not feeling well and at least get vitamins B and D checked. Have bloodwork for thyroid issues, and check testosterone levels. Anxiety can even be caused by low blood sugar. If they rule out a few things, an antidepressant or antipsychotic might help.