Personally, I think it depends on what are your goals/aspirations after you complete your residency. If you want to own your own practice once your residency is complete, either through starting up your own (really tough in today's world) or buying a practice from a retiring podiatrist (more likely and hopefully a safer move), I believe having an MBA would be very convenient. In theory, you would have been taught the knowledge on how to best maintain (or grow) your practice while adjusting to life as an attending physician. Of course, knowledge of business and practice of business are two completely different things.
Where an MBA may not be as convenient or not even needed is if your plan on working in a clinic or hospital, where you will have little to no interaction with the business side of medicine. Being named an associate in an existing private practice could also be lumped in this category. Here you can focus on adjusting as a full time physician and more importantly, focus on the income you are bringing into the practice. Hopefully by time you are brought on as partner bc of your hard work as an associate, you learned something about a balance sheet, income statements, employee payroll and benefits, and other aspects one will need to know to operate a business.
This is my opinion on a MBA at least, I'm sure there are others.