This is how Tolkien views machinery in his Middle-Earth. Horne elaborates:
The basics of Tolkien’s love for trees and nature over his dislike for machinery were set early in his life. Later, the reader finds virtually all mention of “machinery” in The Lord of the Rings is associated with villains like Saruman and Sauron in the pursuit of power and the enslavement of others.
The trees in Tolkien’s world are the Ents. They are the ancient giant, talking trees who become important allies in the fight against evil. The ancient rises to war against the present menace.