Only if people decide they'd rather rely on a pre-generated fractal world than actually create their own. Which, in my mind, eliminates the human element of creativity and just isn't as fun as actually being physically involved with the design. But even if that were to become the case, I fail to see the harm in developing a library of potential candidates for regional civilizations.

When you assemble a jury you don't pick 10 people and then that's what you're stuck with, you draw on a substantially larger pool and widdle down the ones that don't fit your case until you have something you think you can make work in your favor.