But the author acknowledged times that someone said something stupid about AI?

He's not claiming there's no flaws or that there aren't CEOs claiming more than is possible right now. He's making the point that these don't negate the parts that are genuinely impressive.

I've encountered waaaay too many "you can't possibly have done that with AI because AI occasionally hallucinates" and "CEOs say things for marketing therefore AI can't really do anything" type of posts.