My comments on this topic are meant in the context of traditional music only, by the way.

And all of my quoted comment was all about "people" and percentages. Genre, likes &c got nothing to do with nothing. Taylor freaking Swift will never inspire +51% of the people to learn to play an instrument by any method, in any fashion.

Most "people" walk right past a piano without stopping. The entire subject matter is a nonstarter. Not learning to hum or whistle a tune is what the majority of "people" do.

Your neat Mozart or messy Beethoven is at the opposite end of that sorting. The edited out "...professional composers, arrangers and conductors..." of any sort of music will have to know which end of the sheet music is up if they want a realistic shot at the j-o-b.