Congrats on your successful reapp; perhaps you might consider whether your situation compares to that of a ~3.0 applicant. If you have a reasonably competitive GPA, say 3.4 or greater, then don't you think something other than your GPA is why you weren't successful the first time? By contrast, it's very safe imho to assume that a ~3.0 candidate didn't get in because of their ~3.0. Get all the clinical exposure you want, you're still a 3.0, don't let the door hit you on the way out.
There are students with 3.4's or higher doing SMPs, which makes no sense to me. Is this the case you're baffled by? That I would understand.
I don't think there's philosophy behind an adcom's decision to not accept a 3.0, over a pile of better-numbered applicants, all else being equal. Adcoms want to admit students who are going to thrive under enormous academic pressure for a very long stretch of time, before there's any real opportunity to exercise non-academic assets. Not even a solid MCAT to go with a ~3.0 is going to give an adcom much confidence in a student's ability to make it through a 2 year death march. Not with thousands of better-numbered apps to choose from.
In other words, if academics are an obvious app problem, then academics are an obvious app solution. Without an obvious app problem, an immediate reapp makes sense.