The Powers of the Istari

[Inziladun]

Originally Posted by Huinesoron

But that would have left the Numenoreans as a continuing annoyance. The Valar clearly didn't want that - but they also didn't want to take any measures themselves. And it's not like the Numenoreans were harmless: they reached Eressea, Alqualonde, and Tirion under arms, and could easily have sacked any of those. The only city the Valar actually protected by their actions was Valmar - you know, the one they themselves lived in.

It wasn't that the Valar were reluctant to deal with Numenor themselves; they lacked the authority to take such drastic action as the situation merited.
As the Governors of Arda, they deferred to the One to correct his Children directly.