Not all historic primitive art is equally stimulating. Not all objects energize an artist's expressive struggle. Contemporary critics of Cezanne found his painting to be primitive. But primitivism has negative implications. This is an equally apt summation of critical reaction to primitiveness in contemporary pottery.
Primitive qualities are expressive of natural weatheredness and creative directness.
A primitive process entails and conveys an unfettered approach to technique, thus appearing to some as a lack of technique. Earthiness can remove the layers of technical sophistication that often afflict pottery. The impure character of material and process plays against a purified sense of form. Austerity meets abandon. You become aware of your skill, and then you must get beyond that awareness before you can reach autumn and then winter.