Radagast in The Hobbit Film (SPOILERS)

[Morthoron]

Originally Posted by Bêthberry

Of course I know that Radagast "belongs" to Yavanna. My question is really a larger, more philosophical one.

Why is it that this affinity with the natural world is seen as a weakness or failing? Why does it have to be the natural world that is Radagast's link to the Valar? (Yes, I know that the Blue Wizards have their affinities, but they don't figure much in the tales.)

Is there some implication that such dedication to the birds of Arda and the trees is somehow a lesser act and that dedication to the marred is somehow a sign of failure or is doomed to failure?

Radagast's mission wasn't to commune with the birds and bees, it was, with the other Istari, to unite the foes of the One Enemy; therefore, like Saruman and the Blue Wizards, he failed completely. His failure may be seen as benign when compared to the malignant intent of Saruman, but he strayed from the objective. He went native, I guess.