Some people like to exploit the game with overpowered strategies, such as using Anarchy with diplomacy, a lynchman, four damage dealers, the Grail, and other forbidden perks. In that case, it's a good idea to have a clean, unmodded version of the game on hand if you want to play that way.
It's easy enough to simply disable the mod and play the "vanilla HD+" version – it only takes a couple of mouse clicks.
