So actors' performances on the stage are the most important factor in plays. This is the case not only with plays but also with all the genres of so-called stage art. At any rate, plays are actors' art and actors take a main part in practicing performance. If we are to talk about the difference among a play, a movie, and a TV drama, we should discuss the relationship between pure art and popular art. I think we can compare it to a tree.
Pure art is the power of thinking.
In fact, it is not extreme to say that the development of the history has been led by a few intellectuals. That is, the very intellectuals who think what is supposed to be thought lead our times. The root of the tree, even if it is invisible, has the power to support the tree and boughs to be born. Likewise, the reason why there should be pure art is not only for our happiness but also for our descendants' happiness and for the subsistence of culture itself. That is, pure art can provide a power to protect the basis of our culture.