The interwebs is a supermassive pool of knowledge that just sort of sits out there mostly unsynthesized because it’s too huge for anyone to synthesize. People can drill into it via searches on Google etc. but on most subjects even that will yield too much information to synthesize. The pool of information is simply too big for anyone to wrap their arms around, and that’s where AI comes in. It’s a tool for doing large scale synthesis. It extends the human ability to synthesize — i.e. to derive general knowledge from a collection of particular information — by removing the speed limitations of the human mind.
Problem is that AI has no “common sense” and there is a whole lot of garbage mixed in with any actual usable knowledge on the internet.
A human can sift the garbage out while he’s synthesizing, but even most humans don’t do that very well.