I agree with the decision to cut Tom Bombadil, but those people who wanted him in are the coffee-house purists who will dislike a piece of art just to have something to complain about.

Keep in mind that you are supposed to dislike Tom Bombadil, or Iarwain Ben-adar, in the same way you were supposed to dislike Radagast. Both of them turned their backs on middle earth to pursue their own happiness, and it was important to see this in some of the characters in middle earth.