There are plenty of musicians here saying this is useful for them or would be useful while learning.

As meta commentary, those not in a subgroup sometime fail to see utility of a thing built for that subgroup and it's easy to feel a sense of superiority "oh how dumb and trivial this thing is", but it may be better to first have curiosity and see how the intended audience responds. Often it's not dumb or trivial, you're missing context and experience to see the value.

I've played the piano for years. Your immediate conclusion that my dislike must stem from inexperience instead of a more nuanced place strikes me as the exact kind of thing you're lamenting in your comment.

It’s the typical “engineer thinking they’re smarter than everyone else” trope. From my experience, engineers fall squarely in the middle of the bell curve. The AI hate is just used as justification, so I don’t even take it that seriously. And fwiw, as someone that played piano when I was younger, this is 100% a useful tool. In fact, during quarantine I was learning to play guitar and used tools like this to learn which string is which by ear.