Because we've seen the hype cycle run before, With AI, with VR, where unrealistic promises are made and widely believed for no real reason, and no one cares when they're never realized.
"AI can do X" for all X is an unrealistic hope.
"AI can do X" for all X is an unrealistic hope.
My fellow uni students could pass tests on one of my courses by regurgitating the (wrong) answers that had been published and reused for years. I was not popular with faculty for pointing that out, and had most of a year's papers cancelled after the fact...