I think you are right about this and the long term downward trending prices of Steem and Hive implies that you are right.

Back in the day when Bitcoin was still new there were a lot of blogging communities that were just creating a ton of click bait. These sites came to be known as "content farms". People were just creating trash content that was design to exploit Google's search algorithm and run a ton of ads to collect money for the site owners and give some revenue share to people posting "content".

Google got hip to this and changed their algorithm to prioritize quality and the consequence of this was that most of these content farms started to lose page rank and ad revenue.

The mechanism for curating and selecting for quality on most of these blockchain blogging platforms are upvoting which has lead to tribalism or people creating new communities. I don't have a problem with people creating communities, but it seems like the more popular communities evolve their own front ends and 2nd layer coins that seem to be all in service of just more tribalism--a tribe within a tribe.

So far you are right about AI. Google does a better job of serving up "relevance" and "quality" than any other mechanism. This pure voting mechanism is never going to work because it relies on the "wisdom of the crowd". Sometimes the wisdom of the crowd works, but sometimes it just incentivizes non sense articles like:

"(Insert crypto here) is going to pump 10x" or "Influencer CryptoSomebody says, Blah blah blah" ...

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