One of the most pervasive misconceptions about the Beatles is that they were awful as an in-concert act. The myth, as I recall my eighth-grade music teacher putting it, says the Beatles weren’t even playing up there on stage most of the time. They were only pretending to because no one could hear them anyway. And then when they did play, they weren’t much good, relying as they did on on studio time and trickery to make their records sound nice.
These lines are often parrotted even by Beatles fans. The band's own record label didn’t see fit to release any live material until seven years after the group had broken up, and that set has been out of print for an age.