Actually, the lore is that you can actually spend a little while in there before you get severely hurt, and after that you need a period to recover your before returning so that you don't suffer from any long-lasting side-effect.
That's exactly how they explain it, there's even an NPC at the entrance (the entry NPC I forget his name) that warns you that and that he WILL forcibly extract your team if you spend too long inside using a Return spell on you.

Also supposedly Adventurers are a race of idiots willing to do pretty much any and all crazy idiocies for money, also the very image of the vagabond, according to in-game lore >_>

And from what I know- The pools of Goldbile in the Aurum Vale will kill you sufficiently fast if you decide to stand on them.