No, it's the simplest. If calligraphy must use Xuan paper, are those ancient and modern silk books and murals considered as calligraphy? Not only do I think calligraphy is called calligraphy, but also the shape, quality and meaning of words. When papermaking was immature and paper was widely used, calligraphy was originally written with bamboo slips. As far as the world is concerned, it is not all written on rice paper.
Fringed paper for practicing calligraphy is also possible. It's just that in general, everyone uses rice paper to facilitate mounting and preservation. More importantly, the core point is that the performance effect of Xuan paper is generally better.