Having a quest where 'you can use it even if you fail' is not productive, theres a huge percentage of the player base that probably can't yet do Hydra and get the quest, and you think that's ok? wow!
I see your point. But Imean, it's the same as people who do the Tag quests and such and just count that as a quick loss to get their advanced quest energy bottle. The advanced quest Hydra key would be truly onerous if it had a damage minimum (like required you to hit a 1 key or even a chest)