[yamazakiwi]

Your argument is different from your explanation. You're speaking about complete isolation. Children need some socialization for them to adapt to the modern world. That's different than proving humans need social connections in the long term. Almost all people want some form of socialization, some less, some more. It's extremely rare a person would want complete isolation forever in perpetuity and I say that as a person who can only handle about an hour of socialization before I want to climb in a hole. What no one talks about is when too much socialization can impair growth.