Calligraphy pays attention to hard work and self-cultivation, while calligraphy pays attention to feeling the charm of words from the heart.
Writing, without explanation, is well known. Let me ask you a question. Excuse me, is homework also called calligraphy? Obviously you can't say that, so there is a difference between calligraphy and shoes.
Recommend a person, Wang Qicai, one of the top ten calligraphers in China, who will explain this problem to you more clearly.