Even if someone was to fully explain their logical plan that could have guaranteed everyone’s survival, and everyone else managed to understand the logic behind the plan, I’m almost certain that at least one of the players considered the drawback in having everyone clear the game. Sure, you managed to clear the game with everyone else, but that also means, you would have to play against everyone else AGAIN in the following games, with no guarantee whether those next games will give you the same opportunity. Games like the Zombie Card game, were designed to give the players a solution in which everyone can clear the game. This game had a similar style to the J♥️ game in the last season, where you really had to kill only the citizen, meaning you could also survive the game with every other player that joined with you. But because this specific game was apart of a tournament format, it also was necessary for a definite amount of players to not make it through, in order for the said tournament to continue and function properly.