The danger is whether they keep up with the field or just continue what they learned in their time in medical school. At least with a major hospital they are surrounded by other experts in the field including a batches of newly trained doctors.

There’s an OBGYN we’ve long had a relationship with who takes on residents and cross pollinates with them for a win win knowledge transfer. They also volunteer overseas with charitable medical efforts. Those are probably interesting avenues for keeping up with things from the outside to some degree I imagine.