The point is that Linux (from the perspective of the ad) is all about community -- that knowledge is easily shared. Whenever someone solves a problem with Linux, the entire community benefits, not just that one user, because the knowledge of that user is disseminated to the entire community. Not just in BBS postings and whatnot, but the fact that a problem solved in an open source application is immediately put back into the main distribution so that everyone can benefit. This is different than Windows usually is on both those counts.

Note that the boy in the commercial is just an anthropomorphization of Linux and/or the Linux community -- he doesn't do anything himself; he's not really human. He exists solely to collect knowledge and distribute it.