I think both of you are right. Beware the blanket statements. We call MD's out on their B.S. all the time at my program, (4 yr). In the minds of some at our hospital though we are looked at as inferior. It depends on the MD and his experience with OMFS.
Does the MD help with pure medical knowledge? Of course. Do you need it for respect at the hospital? Depends on who you are working with. At our program all anesthesia peeps love us. I can think of a few guys on other services who think poorly of us, that we have no right in the OR, regardless of MD or not. They view us as dentists, pure and simple. When they come through the OR and we have a coronal turned we make comments like - is that crown ready? Screw them. Why do they care? Because our life is awesome after residency.
What it boils down to, and this is a recurrent trend on SDN, is that you do what you want. Fly under the radar, let those who let it get to them, get to them.
The area I plan on practicing at does not care what the credentials are behind your name. They care that you will take care of the hospital patients that come in on your call, they care that the 5 implants they have sent to you are easy to restore, they care that you don't cause paresthesia, they care that the double jaw comes out looking like brad pitt, and if you have someone who comes in with 10 co-morbidities, well, you send them to their PCP for a med con and you make sure they are stable and labs are all normal.
Fortunately I go to a program where we see sickies all day long. No big deal.
PERSONALLY, I don't need an MD to do this. OTHERS may want it. That is their prerogative, and I commend them for it. I hope we can have many intelligent study clubs together in the future.