Fair point. He is that good.
That being said, sometimes tone can really mess with the perception of your technique. Recently I thought that I had totally lost all facilty to play cleanly on the lower 2 strings (in pitch) - no matter what I did it sounded cruddy. I had recently moved the living room around and realised that I was sitting at a different distance and angle from the cab than usual and that if I stood up or moved my head a few of inches eitherside, my technique returned. I discovered (after a google search) that I was experiencing the speaker ‘beam’. It sounded so harsh and messy that my ear couldn’t really hear what was going on. Blew my mind! I knew that pointing a mic on axis at the centre of the cone is harsh, but I never thought i would experience something so baffling to my ears.
Caveat: I do have a bit of hearing loss which probably didn’t help lol!