my point is that music will evolve without the assistance of commercialisation, and i have provided examples, so putting forward an argument that commercialisation is good because it causes the music to evolve is a false argument.
music has evolved and continues to evolve for other reasons apart from money making.
JAZZ is another genre where styles have evolved for reasons other than commercialisation, the idea that Bird Parker developed be bop to make money is a joke
In the late 1930s Parker began to practice diligently. During this period he mastered improvisation and developed some of the ideas that led to bebop. In an interview with Paul Desmond, he said that he spent three to four years practicing up to 15 hours a day.[7]

Bands led by Count Basie and Bennie Moten certainly influenced Parker. He played with local bands in jazz clubs around Kansas City, Missouri, where he perfected his technique, with the assistance of Buster Smith, whose dynamic transitions to double and triple time influenced Parker's developing style.

In 1937, Parker played at a jam session at the Reno Club in Kansas City. His attempt to improvise failed when he lost track of the chord changes. This prompted Jo Jones, the drummer for Count Basie's Orchestra, to contemptuously throw a cymbal at his feet as a signal to leave the stage. However, rather than discouraging Parker, the incident caused him to vow to practice harder, and turned out to be a seminal moment in the young musician's career when he returned as a new man a year later.Parker was a highly influential jazz soloist and a leading figure in the development of bebop,[2] a form of jazz characterized by fast tempos, virtuosic technique and advanced harmonies. Parker was a blazingly fast virtuoso, and he introduced revolutionary harmonic ideas including rapid passing chords, new variants of altered chords, and chord substitutions. His tone ranged from clean and penetrating to sweet and somber. Parker acquired the nickname "Yardbird" early in his career.[3] This, and the shortened form "Bird", continued to be used for the rest of his life, inspiring the titles of a number of Parker compositions, such as "Yardbird Suite", "Ornithology", "Bird Gets the Worm", and "Bird of Paradise". Parker was an icon for the hipster subculture and later the Beat Generation, personifying the jazz musician as an uncompromising artist and intellectual rather than just an entertainer.