Mobs tend to get a little too weak in survival after you get your full gear. And die to fast by your weapons. This at least makes it so that mobs can actually still damage you with full diamond, and survive your single attack. Sure, you could also not wear armor, but then you are vulnerable to other players.
Also, we might be able to host a more excited event with this plugin, depending if we get permission for it.
(Also, we would need to make a bigger museum for all Rich's demonspawn then.)