Experienced learner vs. Intermediate learner

Seemingly everyone I know can tell me the difference between "good" art and "bad" art. They will even know such artist as Michelangelo, Monet, and Picasso. What does this mean? Is art simple to understand and create? Is that why so often you hear "my child could make that." in reference to the "bad" art? Let me begin to try and explain my philosophy on who actually understands the differences in "good" art versus "bad" art. It is believed by many that there are two types of learners. There is an expert learner for one, and then the intermediate learner. An expert learner would judge the value of a piece of art on it's "finish", meaning "how it is cleaned up and refined for public scrutiny". They also, with an understanding of art history and theory, would be able to break a piece of artwork down into core concepts for a balanced evaluation. Whereas an intermediate learner may base their feelings of what's good or bad art on such things as their personal ability to relate to the topic, or their ability to "see" or understand what it is they are looking at. Expert learners also with their understanding of art history and art theory can understand the thought process behind abstract art. They understand ideas like, "How did it originate in the artist thought process?" and "How does it relate to the progression of art throughout history?" An intermediate learner would actually have a vague understanding of abstract art. However, without rich understanding of art history, they simply would not be able to understand the progression of how something like the Mona Lisa could relate to Damien Hirst's piece The Physical Impossibility of Death in the Mind of Someone Living. They also, because of their lack of understanding of the history of art would only be able to recognize society as a subject for art. An expert learner would understand how art and society shape each other. They would be able to understand the idea that art often is a critique on society and it's values. As you can see a child may make art worthy of the refrigerator, however, it takes a lot more knowledge to create art worthy of a gallery wall or space outside for all to view.