A popular misconception within the music scene is that a lot of music is made based on financial interests and therefore is simple and basic like this Max Headroom of the German G Rap scene repeats adopted from an Authority.
It means also that they admit that the quality of music played by majors, became worse over the years. Actually, it is over the decades. The typical 3 minute track or song music that dominates from all music genres the listeners today derives or became popular in the 50ies by Elvis Presley and in his comrads selling vinyl records and being played on comercial radio.
Except the Beach Boys, no casting band existed and in the opposite head hunters looked around for artists to be signed that already made a living based on thousands of tiny venues pretty much like persiflaged in the Blues Brothers. Musicians since ever travelled and only the biggest in history like Bach or Vivaldi had fixed sponsors that fincanced them even entire Orchestras and also build venues. Living by a floot or guitar got you a full stomach for centuries, if you kept travelling around until way into the 60ies. Only in the 80ies Hip-Hop street performances where outlawed in general.
Good music sells. The statement to create bad music to sell music better does make no sence, since there is a difference between a man with a floot heading from Pub to Pub and Mozart to Bach being sponsored with accomodation and even entire conecert halls build or churches with bigger organs upgraded.
Something else must have changed.
Hint: The Sponsor!