If you're interested in the opinion of someone who authored (and continues to work on) the #12 chess engine, I would note that there are at least two possibilities for what constitutes "optimal chess" - first would be "minimax-optimal chess", wherein the player never chooses a move that worsens the theoretical outcome of the position (i.e. losing a win for a draw or a draw for a loss), choosing arbitrarily among the remaining moves available, and second would be "expected-value optimal" chess, wherein the player always chooses the move that maximises their expected value (that is, p(win) + 0.5 * p(draw)), taking into account the opponent's behaviour. These two decision procedures are likely thousands of Elo apart when compared against e.g. Stockfish.

The first agent (Minimax-Optimal) will choose arbitrarily between the opening moves that aren't f2f3 or g2g4, as they are all drawn. This style of decision-making will make it very easy for Stockfish to hold Minimax-Optimal to a draw.

The second agent (E[V]-Given-Opponent-Optimal) would, contrastingly, be willing to make a theoretical blunder against Stockfish if it knew that Stockfish would fail to punish such a move, and would choose the line of play most difficult for Stockfish to cope with. As such, I'd expect this EVGOO agent to beat Stockfish from the starting position, by choosing a very "lively" line of play.