Yes! Thank you, I get annoyed when people think there is one definition of good design/art/beauty ...it's a thinly veiled display of narcissism. It's like trying to tell someone what kind of food they like, or who they find attractive- there are trends, and sometimes it seems like there are rules, but nothing is ever 100% universal as far as I can tell.
The article is discussing "simplicity" as one aspect of design. While I agree different designs can really only be viewed subjectively there are some aspects of simplicity that can be judged objectively.