I don't agree. I grew up with piano and had music friends all through my life. Classical music requires a certain level of math ability. Modern musicians scorn this and frankly it shows.

Many classical musicians have only a cursory understanding of mathematics. Many modern musicians are pushing the boundaries. There's a reason there's a genre named "math rock". Also, Jazz probably pushed the maths of music beyond classical music. As a last example, listen to some Meshuggah :-)