What I do like about AST's card system is it's like dealing with things in life. We always hope for the best to happen in our life yet most often you only get disappointment. So you use what life gives you to achieve the best you can make out of it. You wish to always draw The Balance or Arrow every time, but most likely you only get what, The Spire? The Ewer? The Bole? An AST must learn to adapt and make use of the card drawn for the best possible outcome at that particular situation. See? It's just the same with how we're dealing with things that happen in our real life.