The reason you can't fork it is because the copyright owner wants to maintain control. That means that the content will never be on a blockchain even if we see the 8+ orders of magnitude efficiency improvements which would be needed to do so and when you've built the systems which would be necessary to hold and authorize access you don't get anything except expense and support burden from a blockchain.
Oh, my point was that we can and already have (ok, a DHT is not a blockchain, but it's the same sort of deal). I pay for Prime for the shipping, so I could stream it, but I still torrent the content because it's just more convenient to have the file.
The only thing that DeFi changes about this scenario is that it's going to get easier for me to pay the people who make the content available in the format that I prefer. When it's sufficiently mature, that'll mean paying the artists as well. It's just a shame that we're not there yet.
Drives me batshit that amazon does this on Prime. Play the fucking film you bastards