IMO, it's more about wanting to practice in an underserved area of Oregon that you can prove with letters, research, residence history, etc.
Here's a nice case in point story for you: yesterday I ran into an OHSU alum at Trader Joe's. I was buying produce, and asked a woman in scrubs with a doctor's name badge for interview advice, jokingly. Come to find out, she's practicing at the UC Davis Medical Center. When I lived in LA, I ran into another OHSU trained alumna doing her residency at Cedars Sinai, trying to establish herself in Southern California. This really bothers me.
But before I do an enormous face palm, I'll just say that public medical schools should me more stringent about who they let in. It should be more about serving the mission of the school and the state's need for physicians, not creating a homogenous class of 22 year old phy sci majors with 3.9 GPAs. All I know is that if I get into OHSU, U of Arizona, or U of Colorado, you'd better believe that I'll practice in that state.