It's not a fiction. People do their jobs even if they don't like the current or past President. I'm sure you can pull out a long list of people who didn't, but unless you name everybody, it simply isn't a fiction. My claim isn't bureaucrats are always apolitical, it's that they mostly are. Showing that some aren't doesn't show that they mostly are.

Take the executive assistant to the American diplomat to, say, Sweden. They file paperwork and schedule appointments for the diplomat. Their role is operational. Logistics stuff. Coordinating what goes where. Setup a meeting between three very important busy people and juggle their calendars. Does that position really need to be someone we vote for? They do operations, not make policy.

Career bureaucrats aren’t just scheduling appointments and filing paperwork. They are doing entire rulemakings, preparing litigation campaigns, etc.

In law school I was an intern for a Commissioner at the FCC. The Bureaus, which were staffed by career civil servants, would send entire rules and orders (hundreds of pages) fully formed up for the political appointees to vote on. Now, I think the career folks at the FCC are fantastic and very responsive to policy changes between administrations. But that’s not true for many agencies. And in those agencies, the career civil servants wield tremendous power and make it very hard for appointees to implement policy.

‘Because I say so’? Really?