When the administrators/bureaucrats (whatever your preferred terms are) have very limited and defined powers, I agree they are different. When the administrative powers become wide-sweeping and ill-defined, the powers are difficult to differentiate from those of the politicians.
What you’re seeing is the result of the USA voting in a party and president that made it clear beforehand that they were going to install puppet civil servants to do their will. Most other developed countries have avoided this scenario.
It’s important that most of the civil service is staffed by permanent employees hired through a fair and well-defined process and not appointed for political reasons.