Complex sentence: The criticism is applied because Polkit has a primary task of restricting root processes as an'authority' and a secondary (but easily mistaken for its primary) task of allowing users to obtain temporary privileges'authorization'.
Split into simpler sentences: The criticism is applied because Polkit has a primary task of restricting root processes as an'authority'. A secondary (but easily mistaken for its primary) task of allowing users to obtain temporary privileges,'authorization'.