This is true for every psychological condition and has only tangentially to do with grades. There needs to be a burden of suffering (German: “Leidensdruck”) in order for a psychological condition to be considered a “problem” that needs “fixing”. As long as the the person doesn’t have this and society doesn’t force anything on that person (because for example they broke the law), there is nothing to act upon. This is also why some famous and/or successful people are crazy. The FBI has done some investigations into the concept of a the corporate psychopath, which can be successful managers, which are undiagnosed psychopaths.

PS: I am no expert

https://leb.fbi.gov/articles/featured-articles/the-corporate-psychopath