Because these type of bosses they feel insecure, so they won't go and bomb other dept. Coz they always want to be the good guy, dont't like people to think badly of them or think that they are incompetent.
Then they will step on their own dept because they know that their staff LL, bo bian need to listen to them and do whatever they say.
Maybe you say nice and sacarstic things (like "you are so smart!"), they will still let you drown but at least they won't be the ones trying to drown you or help others drown you.
It's very hard to say such "nice" things to this type of people. But just gotta try lorr... Coz I know when I say such things.. Actually I am being very sacarstic.