Santa,

Your argument holds true up to a point. Actually, if people are restrictive about "their" music, there are ways around it. They really can't control it. Don't really know what you mean by "Brass Money". But I know that which is "banned" is often popular.
Witness the rise of so-called "protest" music in the 60's US. Or for that matter, rock and roll and jazz.

As to the academics, often they are trained to keep the status quo. It's easier to study things that way. No pesky changes to interfere with their hypothoses.

The whole folk music revival of the 60's in the US was predicated on the fact that the music was not restricted. It was accessible. So it is and will remain.

Frank