I think you’re over-estimating the capabilities of these tech leaders, especially when the whole industry is repeating the same thing. At that point, it takes a lot of guts to say “No, we’re not going to buy into the hype, we’re going to wait and see” because it’s simply a matter of corporate politics: if AI fails to deliver, it fails to deliver for everyone and the people that bought into the hype can blame the consultants / whatever.
If, however, AI ended up delivering and they missed the boat, they’re going to be held accountable.
It’s much less risky to just follow industry trends. It takes a lot of technical knowledge, gut, and confidence in your own judgement to push back against an industry-wide trend at that level.