> Second, being able to do this using machines instead of a piano itself, which is unaffordable for a lot of people.

What? You can get a piano or a keyboard for a couple hundred dollars.

Unless you mean actually training and being good at the piano being unaffordable, no, that's just lack of skills and/or will to train to become good at it. Anyone can afford to buy an instrument and become good at it if they cared.

I'm sure no actual musician is actually impressed by this slop, and as the GP comment says the actual book written by a human to whose experience I can relate to and be inspired by is really impressive.