There's also a distinction between art and craft.
Craft is less about personal expression, ideas, or philosophy. It is more pragmatic and functional. Commercialism is craft, rarely art. Art is something different, although not everyone has perceptions developed to tell the difference. People based their concept of all artistic expression on what they are able to perceive in a work. It's one reason arrogance is such a problem. A student only perceives a shallow level of a work. The same student produces work on the level they perceived the masterpiece. The student assumes they are a master. The best sign of an artist is someone who has the capacity to perceive beyond what they create. That is the only evidence the person has the capacity to grow.
The two poles of philosophy regarding art are: 1. artistic expression reaches towards an ideal that exists outside of self, and 2. art reveals the nature of self and the perceptual experience of being a human being. I have never understood why some people think an idea is less of an expression of self than an emotion. I am far less defined by my emotions than by my ideas. It is my ideas that create the framework of my mind. Feelings only result from this and from my body chemistry. They are not an entity in and of themselves, but merely a reaction to the meat of who I am. I suspect this is true for all.