That's because that works. Many, many people get excluded from social interactions, and have to compensate somehow. Getting excluded from social stuff means lot

That's because that works. Many, many people get excluded from social interactions, and have to compensate somehow. Getting excluded from social stuff means lots of time on hand ... which makes competence possible. And again, competence is a necessary precondition. No social skills but competent can work. Whatever you want in terms of social skills but not competent is a 100% guaranteed failure. That doesn't mean competent assholes can't fail, but they don't absolutely have to fail.