Like many things of this world, the truth usually is found somewhere in the middle of opposing arguments. I think it is unfair and hyperbole to characterize the LOTR films as straight up action adventure films. That is tarring them with a brush that just does not quite fit. Obviously it was not an art film either. I think the truth lies in the middle. Sure, there were action sequences, and there were in the books also. But there were also moments of intense emotional drama, portrayal of the human condition(and I guess the Elven condition if there is such a thing
), and lots of wonder and beauty that was subtle and sublime.
I think Jackson had all of this in his films if one looks with an open mind.