My headcanon of Sec31, is that the Federation hasn’t figured out what to do about sociopaths yet so they do what any government does to its sociopaths: tell them they’re the good guys and make them spies. Except the Federation is actually evolved beyond that so they just make Sec31 teams chase each other, each team thinking it is chasing some existential threat when really its just another team of sec31 chasing some threat, thinking they are being pursued by the enemy