I think you're forgetting that Firefox is not used exclusively by developers who may find those options useful. They're simply one /portion/ of Firefox users, and in my opinion, developers should be considered power users. In which case, moving some of the more "advanced" options off to about:config, where power users would be more than comfortable.
I don't think the article is advocating for disabling these options completely. Rather simply hiding them from the average Firefox user who doesn't need to mess with them.