my hypothesis is that intelligent people are more suspetible to being diagnosed with mental illness and having more problems with fitting in in society because of their unique mental gifts that are underappreciated by the vast majority of people.
the vast majority of people are only concerned with following trends, socializing and having sex. very little energy goes into figuring things out on a deeper level. the people who are intelligent reproduce in way tinier amounts due to this, most people can't understand the value of intelligence and are only drawn to physical traits and behaviour that would be more suitable in a hunter gatherer society
funnily enough, the intelligent people have ganged together in think tanks and secret societies and will replace the unintelligent people with either AI, robots and automation, as well as depopulation methods
I as a mensa member INFP can safely say that i've suffered an immense deal of torture throughout my highschool years due to this fact. I cant fit in with most people ,and got bullied all the time. thereby collecting a couple of diagnoses like bipolar and autism.