? Sentimental means excessively moving, so how is that showing that the statue of David doesn't fit the category (actually here my quibble is with the article, not you), and, just because people miscategorize it in your opinion, how does that mean there's no such category?

Edit: I see the article is laying claim to being properly, meaningfully moved. It seems that by including "sentimental" the article is saying: Through art, we are in touch with the truth and beauty of the mystery of creation itself, but you are just having an unnecessary moment because you saw a cliche.