Those bands are not famous but despite making sales, they only get a few bucks every year, or it’s the SACEM saying "we forgot to send you the check lol, no biggies." It’s the biggest legal mafia I can think of right now.
Most of the money collected is sent to huge artists (like what Spotify is doing), there is nothing indie about it even if they pretend it’s for the glory of French music.
It's the same idea as to why reducing the amount of means-testing and other hoops to jump to get social benefits would save taxpayers money - sure, more people who don't need benefits would get them, but that's more than offset by what would be saved by eliminating the workload of (and government jobs dedicated to) gate-keeping those benefits.