Absence of such a claim is a commentary on its own, intended or not. Economic activity is almost always presented as a positive thing. It’s said to create jobs, generate wealth, increase production, etc. And here most of the things on the list moved massive amounts of capital without producing any of the positive effects. We get an odd WWW proposal that did actually produce those effects, but for each of those we also get a dozen of blockchain links. I’d say same goes for AI. While it has more utility than blockchain ever did it’s hard to say it was net positive overall to date.