The Internet was a bubble, the Internet literally revolutionized how we communicate with each other and is far more of groundbreaking and influential invention than AI.
And the dotcom bubble popped. Just because it's a bubble doesn't mean the thing is useless, AI is no different. It will pop, and AI will stay, but the bubble will pop regardless. This is just the nature of shoveling obscene amounts of money into companies promising the next big thing.
Does it say that explicitly in the document? I know that's the overall message they're getting at, but actually typing that out in the doc is darkly funny.