Because it is easier to talk about doing than actually doing and anticipation of a dream can be better than the fulfillment of it.
"There is a mental or first creation, and a physical or second creation to all things" -Stephen R. Covey from "The Seven Habits of Highly Effective People"
So that we'll have something to implement, thereby creating value?
I totally agree. You might have a good idea, but if you don't implement it timely or even ever, its worthless.