I think you're conflating two different things. It's entirely possible (and, I think, quite likely) that AI is simultaneously not anthropomorphic (and is not ACTUALLY "excited" in the way I thought you were objecting to earlier), but also IS "intelligent" for all intents and purposes. Is it the same type and nature as human intelligence? No, probably not. Does that mean it's "just a flaky integration" and won't have a seismic effect on the economy? I wouldn't bet on it. It's certainly not a foregone conclusion, whichever way it ends up landing.
And I don't think AGI is a "myth." It may or may not be achieved in the near future with current LLM-like techniques, but it's certainly not categorically impossible just because it won't be "sentient".