And today he's got salient observations on politics which hold much of his attention, and Deep Blue is shut off and has done nothing further.

Not a good argument for turning everything over to the Deep Blues. What's Deep Blue done for me lately?

Yeah, and back then people moved the goal posts too, saying Deep Blue was just "brute-forcing" chess (which isn't even true since it's not a pure minimax search).

We tried this experiment with humans, back in the 17th century, and only a few[1] out of millions managed it given a whole human lifetime each.

[1] Obviously Newton counts as one. Leibniz like Newton figured out calculus. Other people did important work in dynamics though no one else's was as impressive as Newton's. But the vast majority of human-level intelligences trained on texts prior to Newton did not create calculus or derive the equations of motion or come close to doing either of those things.