Reading literature, watching movies or theatre performances, even fine art can cause catharsis. Emotional cleansing, relief, purification.
It is a necessary experience, a useful part of one’s passionate education. It can promote understanding of one’s own behaviour, but also that of others. Recognition of feelings can lead to figuring them out.
The ancient Greeks knew this. The cradle of theatre, the origin of drama was a festivity of and for the people. Undergoing the experience of a theatrical act jointly, led to sophistication, improvement of the public, to the spreading and reinforcement of culture.
Culture, art both have a very important social function. Too often, unfortunately, they are considered a luxury, or amusement of the crowd. I think it is an intellectual right of the people to reach the highest possible level of civilization by every peaceful means. Culture, art are the most appropriate to achieve that goal.