The undergrad school does not matter for getting into residencies, the medical school does. Most physicians are not interested in being researchers and from what this student states I doubt that is on the radar. btw- I do know of physicians who do the same job in the same location who went to Harvard, many different US schools and foreign. That doctor was no better or worse than the others in his specialty. A doctor is a doctor when most of us practice medicine.
Those with a passion for research would choose Michigan but this student does not seem to be that person. OP- decide your passion. Decide your plan B. Figure out if they can happen with Central Michigan.