That is just a completely incorrect statement. I will say that Mature games are able to go more in depth with serous issues in their stories, but what you're saying is that everything Nintendo puts out, SotC, Chrono Trigger, Braid, To the Moon; all those games with AMAZING stories are nothing because they aren't rated Mature. The day someone looks me in the face and says Call of Duty has a better story or writing than Portal is a dark day indeed.