This isn’t the Cthulhu universe. There isn’t some horrible truth ChatGPT can reveal to you which will literally drive you insane. Some people use ChatGPT a lot, some people have psychotic episodes, and there’s going to be enough overlap to write sensationalist stories even if there’s no causative relationship.

I suppose ChatGPT might be harmful to someone who is already delusional by (after pressure) expressing agreement, but I’m not sure about that because as far as I know, you can’t talk a person into or out of psychosis.