Most tanks have dashes at level 54ish+ though. Below that it doesn't really matter if you're using your enmity projectile mixed with aoes to collect the mobs by manually running up, but once you get your dash you should be rushing in.
The reason I see it as important is because provoke is very easy to pop once you're mid pull to peel stray mobs off the rest of your party if necessary while you continue to do your thing. Also the slightly higher range on provoke is nice for using it to peel because you can keep running ahead of your party and continuing to collect the pull.