Of course, some people really are all talk and no action. But I suspect you're assuming too strong a correlation with social skills. The fact is that there are plenty of brilliantly social people who can and do execute, and plenty of smart introverts who can't. I'm not saying, "go into business with your friends!" I'm saying go into business with people you trust and respect.
The corollary is to become someone who is trusted and respected by people who don't share the same skills and biases you have. Good places to start: seriously consider whether "the looks" have merit, and practice carrying friendly conversations.
The simplest example I could think of is typically being relaxed and simply agreeing with everything that your opponent says gives better surface impression than being focused on understanding your opponent and actually trying to defend your point (the classical salesperson vs engineer case). Except that approach would deadlock your execution, but nonetheless I see many people successfully using it to gain one's trust and get preferred over someone who pushed back too much.