IMO it's a direct result of parents getting their children into racing at a very young age, long before they ever learn the social skills needed to interact with dozens or hundreds of people at the level of stress racing (live or sim) creates.
Some parents realize this and make a point to teach them, and set high standards of maturity expectations, but many just push their kids to race and win no matter the cost.
Many parents want their kids to be "the next Jeff Gordon", which is not a bad thing, but they leave out some of the life lessons needed to become an adult at the same time.
Most of us here who know KOK don't really know if he is the same when racing his kart, we can only assume. We know who he is inside LFS, and iRacing, but until someone stands up and shows otherwise, the sim community will continue to judge accordingly.
Who knows, maybe that's part of his plan......