first: all the good players are actually playing arenas..
second: in arenas you have to actually use your abilities the way u supposed to use them, not spam them constantly.. basically no aoe bullshit.. in most rbgs(on HIGH level.. high like super high) you dont even use you cc like at all you just do dps.. other than that all the other parts of pvp take zero skill(even duels nowadays are just braindead)
majority of macroses(targeting etc.) arent even being used in more than 5v5 pvp(there are no binds for them either) majority of macroses arent used either etc.
well you probably never played arenas above even 2k.. all you do is probably que random bgs all day rofl