1. There are many masters of painting who were not monks at first, and their families also had high status. In ancient times, people who could go to school and learn painting were not from ordinary families. But as he grew up, his family or his personal life changed, he suddenly realized the secular world, and eventually became a monk. "Zhu Da", a native of Bada Mountain in the Ming Dynasty, is a typical example.
2. Another reason is: the environment of ancient temples is quiet, elegant and antique, which is suitable for learning and practicing. You can get social relief in life and have a stable source of livelihood. Therefore, I have more energy to study calligraphy and painting carefully.
3. The most important reason: Because temple Buddhism is often exposed to religious activities in various societies, it requires painting talents, and the level of painting is very high, so it specially trains talented monks.
For reference.