Because it is, in relation to the supplies needed and the awareness of it's use, in a minuscule section squeezed in between the rubber stamps and the vellum pads as if it was an afterthought. Which is a pity, since it's insanely easy to do, and the end result is gorgeous. It's the closest I think I'll get to instant gratification. Which is why I made two this week...

Bouquet
Quilled Paper
Bonus Flower:

Violets
Quilled Paper