Not really, he isn’t accounting for variation in skill level in his anecdote. If this piano tuner is just average for his profession, which seems likely, then the piano is still out of tune to the top 20% of discerning musicians, aficionados and expert piano tuners. The problem is there’s only a very small amount of that skill to go around so the majority of concert hall pianos are going to stay imperfectly tuned. The bigger problem is with the author’s assertion that a robotic piano tuner must necessarily be worse than a human. Maybe the currently available electronic tuners are but that they remain so isn’t a given, it’s more likely that they could be better but it would simply cost too much to achieve that level of performance at the moment. With sufficiently cheap electronics and intelligence it may eventually be possible to sell an automatic piano tuner to every piano owner that far exceeds any human’s ability. Is that not a valid way to achieve perfection?