I think that in very high-level terms, you're quite correct. You say, for example, 'it’s not clear to me that “decentralized technology” can prevent the very human process of holding others accountable' - I mean, yeah. That's a good starting point.
On the other hand, your comment betrays some of the underlying revelation here: indeed, the MPAA has gone after the centralized components of peer-to-peer file sharing, as you point out. Yet, the bit torrent protocol remains as strong as ever (which, to be fair, isn't terribly strong in the first place).
The internet has learnt and will continue to learn from this, and the next generation of censorship resistance will decentralize some of the points of failure you have listed (which we centralized in the bit torrent iteration).
As for your last point: regulators understanding how the tech works is not meaningful if regulators are no longer the ones making decisions about the world. That will be a wonderful shift if our goals include peace and justice, which governments have consistently and correctly seen as threats to their existence.
At the end of the day, my point is really this: even in the most wild-eyed crypto-anarchist fantasy, everything is fine. There's no need for the doom and gloom that we're routinely seeing on HN in threads like this.