Mental health workers or therapist can't cure willful ignorance, conspiracy thinking, or someone's dependence of online validation loops. Flat earthers, pizza gate, conspiracy theorist on this incident... all of these people have one thing in common. They're all deeply 17'n moronic people who share a pattern.. they find other people via algorithms that reward suspicion, outrage, and certainty over evidence. Once these folks attach their identity and personality to "knowing the hidden truth" facts don't even matter because it's no longer intellectual.. it's purely emotional and breaking their own beliefs would destroy their fragile ego.
Therapy can help you understand the way you process feelings, severe trauma, burnout, shame, and repetitive relationship patterns or dealing with grief.. It can't cure your crazy uncle from Crenshaw, MS who thinks a plane crash is a Trump conspiracy...