IPFS has some theoretical merits, such as not relying on discrete trackers (which is a point of failure), and at present we have a bunch of mirrors that speeds it up. However, BitTorrent has a better track record regarding resilience against interference (from copyright mafia) or other bad actors. IPFS has so far not openly supported this usage.
I personally don't think it's necessary, but the Blockchain creates an effectively irreversible collectivization of the work: Removal would also undo whatever other work was committed.
It's kind of like cryptographically amortized hostage taking... Erase my book, and the pickle ball championships NFT gets it...
Torrents cannot be updated. Furthermore, torrents are subject to the sites that advertise them getting banned. You will constantly be on the hunt for new trackers.
Blockchain is an obviously superior application here as new books and articles are constantly being released.
That's not neccesarily a bad thing. Once you release something you shouldn't be able to gaslight people by silently updating it - instead, release a new verson with a new torrent.