Sure, but the point here is that you can only destroy the Universe once. Zom is a threat to the Universe? Well All of those listed are. Most have been seen nearly destroying the Universe (and more) - Surtur in particular is actually predestined to do so.
It's all very well arguing The Living Tribunal considered his a great threat and worthy of a visit but on the other hand consider Thanos' various gambits to destroy the universe, The Scarlet Witch's recent multiverse busting, similarly Mikaboshi's attack in Chaos War, or Necrom and The Pheonix's implied threats to creation... all of those are more impressive than anything Zom have achieved thus far and all are equally worthy of a visit from the Tribunal based on that notion surely.
That he didn't intervene on any of these occasions should not be taken as automatically making Zom some special case, rather he's the exception.
How would you see those beings in marvel IF compared to either the Imps or beings like Micheal/Lucifer over in DCU?