Hehe, yes, you’re right, that’s a good point, in the described situation the player wouldn’t be able to follow through on the first few gradual hints to gather the information. And it’s definitely a game where one can get stuck or die, and thus should keep saves.
But, having said that, the game does not check whether the player did actually collect the information “lawfully”, or whether the info comes from a former play session or a hints forum. So in the (probably unlikely) event that someone has already done a lot of exploring and treasure-collecting and then gets into that situation without a savegame and without having found the information in-game, the direct solution from hint number 6 will still work to get them out. I think I’ll add that last bit of meta-information to my post above to reflect that.