Right, if you take a look back at the original post, at the end in bright green, underlined bolded and italics words, it says that these arent rules so much as guidelines.

I firmly believe that when it comes to art, there really are no rules. That being said, the human eye will naturally react favorably (or negatively) to certain color combinations, patterns, etc etc, and thats what these "rules" are meant to teach you.