Thinking out of the box is not mutually exclusive with having a social life. I know many artists and musicians who are doing truly groundbreaking stuff. They all violate the social norms, and have unusual lifestyles. But all of them are very well connected (in art, you have to be). Their social networks are very broad, and very strong.

He's not saying to obsess or be a workaholic. He's saying be creative. The way to be creative is to relax and let your thoughts drift.