Ya. You're going to work 12-18 hours a day running scud work, writing orders, taking call for dental and facial, and taking care of surgical patients, sweat balls in point and pull clinic popping out bombed out dentition, and then, occasionally, you might place 5-25 implants that year for which you will likely receive no follow up or input on their placement or restorability.
Or, you could do a GPR in a VA and place 25-50, restore them, not have call, not do that scud work, and complete a reasonable day in term of hours, while keeping sharp on your basic dentistry.
Or, you could pony up some cash and take a CE on implant placement, because it's putting a screw in a bone, and be done with it in weeks, while still making a great income and thus, netting more cash then using a GPR for the sole purpose of learning implants.
OMFS internships serve to train people for OMFS residencies....not how to place implants.