Why do some calligraphers look so clumsy?

Some calligraphy is smooth and delicate, rough and powerful, while others look clumsy. In fact, it looks clumsy on the surface, but it is actually clumsy, with sharp edges inside ... each has its own personality, just like people, tall and short, thin and strong, and each has its own strengths. This is especially true of calligraphy. Each has his own strengths and personality. If all calligraphy is drawn in the same mold, some people like clumsiness and simplicity. This is the artistic charm of calligraphy.