There are so many myths out there about what works for running. As a natural runner, I take a lot of what's out there with a grain of salt and stick with what works for me.
The you over-pronate myth: debunked; research found running shoes that correct for pronation did not help reduce injury.
The you need to run barefoot myth: debunked; research found heel striking is more economical physiologically.
The running more is better for you myth: debunked; research found excessive exercise can cause hearth problems (the threshold, however, is unknown).
So what's the upshot? Keep running and run your own race.