I agree wholeheartedly that the big push is "running is good for body and mind," but the casual and penguin culture does not adequately make this the focus. It's a marketing gimmick to boost race entries, which is the primary concern of RnR (of course their mission statement can't say that).
Elite training requires discipline of mind and body. Some guys and gals run all the time and never really get fast, but at least they are healthy because of their good habits. Many of the casual runners don't really behave with any of the discipline required to reap the benefits of running. It's clear that many races and RnR care most about participation revenue. They really don't care what the athlete does the other 364 days of the year spent away from their event. If RnR cared about runner health, then they'd encourage a lot more of them to become faster and appreciate what an elite athlete does.