Weaving and rug making are unlike most other arts and crafts in that they are essentially digital. (I and don't just mean that they are made by hand--pun intended.)

The warp and weft of the weave mean the field is essentially a rectangular matrix, and each point of intersection of a warp and weft thread is then analogous to a pixel. At each intersection, there is a limited number of choices the weaver can make. (Theoretically, the choices could be infinite, because dyes can be mixed in infinitely variable proportions, but in traditional designs, the weaver is limited to 4 or 5 distinct colors.)

It is only because of this "digitalness" that a deviation from a planned pattern can be clearly identified as an imperfection—or that strict adherence to the pattern can be defined as perfection.

I don't think you can approach the same kind of clarity when discussing, say, pottery, which is not digital, because clay is infinitely malleable, allowing infinitely variable shapes. Rug weavers and potters will inevitably have different ideas of what they mean by perfection, and what the value of perfection is.