@Ericson2314 I personally believe so, but it is not my intention to get into a culture war over it. Keep in mind that the essay is written by a problem solver, and is really a defense of combinatorics (broadly construed) against mathematics that fosters theory.
I personally don’t subscribe to a hard line between the two, specifically because of my faith in theory: if theory has not yet served combinatorics in the way it has served the rest of mathematics, then surely the reason is that theory is still too young.