An artist sees what the world shows them and uses their unique way to share their vision with others. Whether it be visual, audio, the written word, or any combination of these.
A true understanding of Plato’s Allegory of The Cave is about how difficult it is for an artist to accurately convey the image in their mind to the public.
The artist is a person standing out in the sunshine, and the vision in their mind is what they see of the world around them. The public are prisoners chained up in a cave, whose only experience is of shadows cast on the wall.