To touch more on the subject, Kael's Hate also locks down many other decks. Simply because not many decks would use more Towers or Pillars to counteract this card idea's effects. If you have six of these cards in a deck and manage to draw two while your opponent summons three monsters, you effectively disable six Pillars or Towers without including Devourers or Earthquake on the side. If you are challenging a Speed Rainbow deck, you could do irreversible damage if you mixed in stall into your deck. If this card was used against a common Physalia poison based deck, it would also be locked down. Now, what if you used Aflatoxin and this card? Would all your opponent's quanta get drained away nonstop?
Also, I did not limit my statement only to Hope decks, I just said "in particular." That just makes me want to say "Please read my whole post before answering."