First, art students who study calligraphy generally don't have to go out to study, just sign up for a class assault training, which has little effect on calligraphy assault training.
Second, learning calligraphy costs less. You don't need to buy a piano like music, you need to buy paint like painting.
Thirdly, the training time of calligraphy class is relatively short and lasts for several months.
Fourth, it is very important to test the artistic foundation of calligraphy in peacetime, and signing up for short-term training can't improve a lot in a short time.
However, if you want to find a famous teacher to guide you, that's another matter. Such a situation is rare. Even if you want to attend pre-test training like art students now, the cost of calligraphy is very small, because guidance is enough, and it is impossible for a teacher to teach you to write every day.