Any theory which causes solipsism to seem just as likely an explanation for the phenomena it seeks to describe ought to be held in the utmost suspicion.
One of the greatest learning experiences I had was hanging out with Maureen Tucker from the Velvet Underground. There's a woman who has no training and has a very simplistic and very tribal drumming style. I don't even know that she can even do a drum roll, but she's probably my favorite rock drummer because she plays every note perfect.