Art is a broad concept encompassing various forms of human expression. A proxy is an agent or representative acting on behalf of someone or something. Therefore, antonyms for the term "art proxy for" would be words that indicate an absence of representation or substitution. Some possible antonyms for this term could be "absence of creativity," "lack of originality," or "void of expression." These antonyms suggest a lack of representation or substitution, rather than the manifestation of creativity and authenticity associated with art. In essence, antonyms for "art proxy for" negate the concept of art as a means of representation and expression.