Well Marrone lost his power play and Polian bailed. The alternative to the Whaley/Rex era was the Polian/Marrone era. I don't see advocating, more like supposing.
Does getting hired during the Marrone era make him infinitely loyal to the many, incapable of his own opinions? Come on. You think there's a guy in the FO, who is basically a Marrone puppet, and still has a job? Stretch beyond belief.
Furthermore, there are a few guys on this board who backed Marrone. Leroi can be one of them/think EJ sucks, AND have a source that tells him FO things. Just because Kirby hears things and likes Phil Rivers, doesn't mean his source loves Phil.