Well, that's true, but you have to agree that in a real game, it's already difficult to collect one set, and collecting two is almost impossible. The same goes for collecting the entire dragon set - getting one level 7 creature per day is incredibly difficult. This is like getting the Tear of Ashera or the Crown of Angels; it's half the battle, if not more. (I don't know how you guys feel, but in my opinion, the introduction of collectible artifacts created an imbalance. Mages and Town Defense have it much easier collecting sets thanks to the buildings in their cities, and if there's an artifact shop on the map nearby, they're in a great position.)
Bow down and hear our cry,
Our earthly rulers falter,
Our people drift and die,
The walls of gold entomb us,
The swords of scorn divide,
Take not thy thunder from us,
Take away our pride.
G.K. Chesterton: English Hymnal