OK, this might be old but still good idea
take a quick look at D4 will tell you that there are ppl with hell of a damage per hit . when you get into D4 , no matter what, they wont let you get BH.
in the other hand, there are ppl in D1 with +20K str. they do nothing but training ! they dont enjoy playing the game at all.
whats the point of playing when you do nothing ?