It isn't just the managers doing this. Anyone who isn't in a position of authority but has knowledge of the state-of-the-art, research on it, etc. can tell when someone in that position is pushing their ideals over actually having done research or doing logic beyond a bunch of unquantifiable 'what if' arguments. It takes 5 minutes of online research to dismantle their arguments. But it still happens regardless, even in CS and SD where myths are pushed as absolute truths.