Quantity has a quality of its own. The first chess engine to beat Gary Kasparov wasn't fundamentally different than earlier ones--it just had a lot more compute power.
The original Google algorithm was trivial: rank web pages by incoming links--its superhuman power at giving us answers ("I'm feeling lucky") was/is entirely due to a massive trove of data.
And remember all the articles about how unreliable Wikipedia was? How can you trust something when anyone can edit a page? But again, the power of quantity--thousands or millions of eyeballs identifying errors--swamped any simple attacks.
Yes, LLMs are literally just matmul. How can anything useful, much less intelligent, emerge from multiplying numbers really fast? But then again, how can anything intelligent emerge from a wet mass of brain cells? After all, we're just meat. How can meat think?