The time where humans + computers in chess were better than just computers was not a long time. That era ended well over a decade ago. Might have been true for only 3-5 years.
Unrelated to the broader discussion, but that's an artifact of the time control. Humans add nothing to Stockfish in a 90+30 game, but correspondence chess, for instance, is played with modern engines and still has competitive interest.
It is not clear to me whether human input really matters in correspondence chess at this point either.
I mused about this several years ago and still haven't really gotten a clear answer one way or the other.