If you look at the actual scenario there, the game was essentially in a stalemate, where the only possible way to win was to force the other player to advance a pawn. Stockfish can’t look 30 moves ahead to see that it’s possible to do that, so would have just flailed around.
You still need stockfish, because without it, any move you make could be a tactical error which the other players computer would pounce on. But stockfish can’t see the greater strategic picture if it’s beyond its tactical horizon.
If you look at the actual scenario there, the game was essentially in a stalemate, where the only possible way to win was to force the other player to advance a pawn. Stockfish can’t look 30 moves ahead to see that it’s possible to do that, so would have just flailed around.
You still need stockfish, because without it, any move you make could be a tactical error which the other players computer would pounce on. But stockfish can’t see the greater strategic picture if it’s beyond its tactical horizon.