1) Why are rogues in WoW and Ragnorak online able to wield axes and two handed weapons? I can understand katanas but why are they allowed to wield heavy weapons that only warriors should use? It doesn't really fit the definition of the class imo.

2) In World of Warcraft, it is actually suggested to use a slow weapon to execute some of their skills usefully such as using a mace, axe, hammer, etc..
I do not really understand why rogues would use slow and heavy weapons since how does it make them different from a warrior in that respect?

thanks