This is generally based on the teacher's qualifications. For example, a calligraphy teacher has a high degree, but his works have not been seen at home and abroad, and he has not won the corresponding awards. Then at least he (she) still needs kung fu practice. Of course, the class fee can be less.
Soft pen calligraphy generally refers to calligraphy works created with soft pen, which should theoretically include brush and soft pen. But in fact, soft pen calligraphy does not exist. There has always been only a hard pen calligraphy and a brush calligraphy. If you know, you don't have to dig deeper.