Why?
What if there was such a secluded place in an open world game, and then finally some player jumps in the official forums and announces that finally he has conquered the "Nocturnal Catacombs" to the "Heart of the nightmare" chamber, without any cheats.
And people would gather and ask, how the hell could he beat the guardians before the last chamber, and similar questions.
It would be like an ongoing contest for the players.
Back in the day i played everquest OA for ps2. there was a monster, clockwork something (i forget i know clockwork was in the name though) that was so tough you needed a whole guild of peopel to beat it. i remember when someone finally beat it people were talking about it on other servers:
"did you hear this guild beat clockwork "something" on the _______ server."
"How'd they do it!!!???, me and all my maxed out/ top level friends went up there and got our asses handed to us
then soon after that other guilds started beating him on a lot, but that first time was impressive.