I think there may be some truth to it tho.
Because if not, all you have to do is run into the dungeon, avoid things, and hey if your good, you can prolly go in nakkid geared >.>
Which, knowing SE and how they can make stuff excruciating, would not be as easy as just sneak, avoid, open chest, and hope for the best that it wont explode/fail
If i were a game developer, i certainly wouldnt make the most valuable chest a random fail/success just by opening it. I'd make sure there would be at least some criteria to a higher success rate.
On a side note, ive noticed alot of early evening parties tend to skip the mobs and sneak alot just opening chests.
The late nighters seem to earnestly kill more mobs and use the pomanders more.
Jus something i personally experienced on my runs.