It has less to do with "being (...) high on themselves" and more to do with the reality.
We have a former president who led a violent insurrection against the government in an attempt to lynch the vice president and anyone in congress who he didn't like. The military actively ignored it and significant parts of the government are protecting him for it.
pretty much the next time republicans have power (trump or no trump), heads will roll: Literally. And if nobody is going to protect organization X on the way to that, why should organization X "fight the good fight" and paint a bullseye on their foreheads?
We see the same with a lot of branches of the government. When the best you can hope for is to have your career torpedoed (and the more likely outcome being you and your family literally getting torpedoed), why are you going to fight a losing battle?