You don't need to learn any notation to understand the concept that human perception of music is driven by relative frequency relationships, not absolute frequency.

Yeah, that seems about right.

Many musicians can just play a song that feels good. Never knowing anything about notation or frequency stuff.

Maybe a data guy can extract something useful from an incomplete dataset too. What was the author trying to do? Showing some prowess with data while learning about music. I think the result was good.