Regularity is more important than frequency

It's a strange reality that consistency is rewarded and regarded much more than sparks of occasional brilliance.
In every sphere of life and examples I have seen - blogging, eating, sleeping,  exercise ... regularity and predictability are more important than anything else. Why is this so?
Well mankind or even life in general is built around patterns of space and time. A routine builds patterns in our mind and reading a pattern becomes easy if there is predictability. We teach our kids about the Hare and the Tortoise. Yet the message can be taken to every domain.