The protesters were right. The technology effectively concentrates wealth on few individuals disproportionally, and creates a very long tail of starving musicians.
The concentrated wealth, instead of being invested back into musicians, is instead used to pay all the extraneous jobs, e.g. promoters, CEOs, accountants, lawyers for fighting IPs, etc.
However, ironically, their jobs were already very mechanical and without free will. No wonder robots do better job than them.