If chess ELO is the best proxy for general intelligence, then surely, even Deep Blue was smarter than any human alive?

You can also claim that the best proxy for general intelligence is being able to multiply large numbers. In which case both humans and LLMs lose resoundingly to an old Casio.

Pick a piss poor metric - get a piss poor result.

Also, LeCun is a fool and his "world model" approach has consistently failed to yield any advantages over either the "pure imitation learning" or modern "imitation learning annealed by RL", but that's an aside.