There are some very talented ones that can help people, but there are also a substantial percentage who are outright quacks if they follow some of the more ridiculous, unscientific ideas of their training.
This. I have had a DO that was far better than some MDs as my GP, just gave a lot more hugs than I was used to. And I have had MDs that were not helpful at all. It boils down to the individual, how well you think they are treating you, and your doctor-patient relationship with them.