He's saying that if swp is buffed and we do "competitive" single target damage, them why would you bring anyone other than a multidot class to any fight? Superior on fights with adds and competitive single target means why bother bringing inferior cleave or dot classes?
The SW
nerf is 3-5% of our overall damage. It is not "sky is falling" worthy. Just shutup and play the game. You and 99.9% of the players playing this game don't play at a competitive level enough for the kinds of class balance changes you're crying for to make a difference.
Just shutup, play the game and stop comparing yourself to other classes, specs, players, raids, difficulty levels etc.