I have no problem with authors deciding not to put (or keep) their books in KDP Select because there are a number of good reasons not to sell an ebook exclusively through Amazon. What does bother me is when people put a book into KDP Select with unrealistic expectations, or don't do their homework about how KDP Select works, or blame Amazon when their books don't sell, and then announce that KDP Select is not a good strategy to follow for independent authors.