Wrong. The presence of "classes" does not imply unfairness. Some amount of randomness is tolerable as well as long as it averages out sufficiently and the player has enough tools to cope with it.
Class based games, RNG based combat goes out the window if you want to have perma-death.
Like I said, I don't expect you to understand even if I would make a long and in depth post about class based combat.
Why do you think all class based games that have some sort of arena or tournament don't allow 1v1? Only 2v2 and up.