They knew that they couldn't beat Hachi Chan but they weren't too disappointed.
They could always run the dungeon again and again. Remnant Dream could take the first tiger and no one would object against it because on the rare chance that it dropped, it would be because of her lucky hands.
There were other players in Dawn that were very lucky as well.
These people were just naturally blessed by the game to have insane luck, and Hachi Chan was definitely one of them. If a player found out that they were lucky, they would recommend themselves to a major guild. Once their luck was verified, they would always be part of the raids and dungeons even if they were an incompetent player.
Many players that were very lucky would set terms and conditions before joining the guild, such as receiving first priority on an item of their class or rare items and mounts.
There were different tiers of lucky players and Hachi Chan was definitely up there.