Not when you have Level 6 dragons with fly (hover).
The point is, a Rogue 5 can spend a daily that, if it hits, will prevent a dragon from flying. Why must the Ranger (the ultimate archer class) have to wait until level 13?
Because as an ultimate archer class, the dragon flying around is much less of a tactical penalty to him than it is to the rogue an almost pure melee class. That is my only guess. I would of given archer powers that inhibit movement fairly early on. Even if a single bow IRL can't do it as well as a machine gun, cover fire is just cool.