Just to clarify, you mean why isn't the skill of computer programming a major part of art school education, taught alongside other basic techniques, like sketch

Just to clarify, you mean why isn't the skill of computer programming a major part of art school education, taught alongside other basic techniques, like sketching, that can be used to create art? I think that's a reasonable question, but I first interpreted your question as more like "why isn't programming appreciated as an art form, with particular examples of code treated as works of art".