Knowledge in art?

In several asian countries, pursuing a career in arts is commonly frowned upon due to several misconceptions and stigma surrounding it. Some even argue that art is useless but it's not always the case. There is something that we can learn from every object around us, including art. This prompts the knowledge question

"What kind of knowledge do you think art brings us?"

To me, arts brings both personal and shared knowledge. From a piece of art work, we can analyse and learn the artist's feelings and gain an insight into their life. The interpretation that a viewer makes upon observation of the art is personal knowledge. When creating art, artists usually begin experimenting with their techniques and come up with newer styles and methods of creation. This can also be considered personal knowledge.

As for shared knowledge, usually aspiring artists go to art college and major in it or work under the guidance of their professors or other artists they wish to learn from. By shadowing an other person, the aspirers gain shared knowledge from them and learn different ways they can get better at.