Thanks, I think that these are good points and worth mentioning. I particularly like the boundary you're trying to identify between where these decentralized mechanisms have a good track record and where they don't. On that note I think that although academia does have complaints about political bias, at least some disciplines seem to be doing a fairly good job of truth-tracking on complex topics. I'll probably think more about this angle.
(I still literally agree with the quoted content, and think that decentralized systems have something going for them which is worth further exploration, but the implicature may be too strong -- in particular the two instances of "might" are doing a lot of work.)