That's fallacious. Of the nine powers in Storm Summoning, only 4 are capable of moving an NPC, and only two of those powers can be used for that purpose, Hurricane and Gale. You're not repositioning anything anywhere with Tornado or Lightning Storm because they're pseudo-pets. You can't control those, you can't tell them not to attack for a few seconds, you can't move them after they've been summoned, and you can't even stop them from imposing Avoid on their targets (which makes them run away from, not toward, the preferred location).
2 of 9 is the sum of Storm Summoning's enemy repositioning potential, and that is not "most of the powers", by any stretch of the imagination. You perceive the set as being focused on that because that's how you want to play it, but that's your choice, not the mandated approach to playing the set. "Can" doesn't mean "have to".