How do you know? She's a director, and by definition totally in bed with the leadership. Would she publicly admit to decisions made in favor of ad revenue and against what's best for the user? Why didn't she, as Product Design Director, or anyone else at Facebook argue for defaulting to stronger rather than weaker privacy settings, or object to the undermining or even ignoring of previously made privacy choices under the guise of new feature releases? And if she or anyone did, and they were shot down, would she tell us?
So many people trusted Colin Powell, including much of the world after his U.N. testimony. Look where that got us. (What Colin Powell Knew and What He Said: http://www.huffingtonpost.com/jonathan-schwarz/colin-powell-...) [And no, waterlesscloud, I'm not comparing "the design of the Facebook newsfeed to the Iraq War," I'm making a point about trusting people with a conflict of interest and/or loyal to the party under question.]