It’s an exaggeration but with some truth to it. Outside of openings and end games the top move for a chess engine is often different from the top move for a player. That said, grandmasters do of course often play the top engine move.

Human players are dealing with both human limitations and human limitations which really changes the game. So a grandmaster can for example benefit from playing a slightly weaker but less well known opening that they have recently studied in depth with the assumption that their opponent hasn’t done the same.