If we define optimal play as never turning a win into a draw or a draw into a loss, then I think it's possible to play a passive-but-optimal style, with few tra

If we define optimal play as never turning a win into a draw or a draw into a loss, then I think it's possible to play a passive-but-optimal style, with few traps for weak players to fall into. Also if a position is "lost" but it's very very non-trivial to see why, a stupid-but-optimal strategy is to resign or move pieces randomly. You need psychology to win from a lost position.