I quite agree about most things said In the case of my story this guy was playing in a pub/bar the volume from the customers was louder than his keyboard but he did not sequence his own songs therefore he was fumbling about all over the place trying to make it look good
Of course a concert is a different ball game many years ago we were involved in an organ/keyboard society people therefore soley came along to see and hear a professional even then people made comments and said they were cheating no person can achieve all those sound with just two hands little did they understand that the performer had sometimes sequenced the sounds at home