These are defensible positions based on various world views, but they should not be accepted automatically. But I see here and other places people speaking as if this is just "obvious fact."
This was not the case in the past. Civic duty, the need for a functioning civil service, the notion of a commonwealth and/or social contract, etc are all foundational notions coming out of the enlightenment and were at least formerly mainstream.
The Ayn Rand types have always been around. And they're welcome to their positions. I'm concerned about how we get here now that this is a default position for people to take in North American society. I certainly don't agree with it. And I suspect if you force the majority of "mainstream" people to go through the arguments piece by piece, they wouldn't either.
I'd also argue that decades of corroding the public service's effectiveness through economic and ideological warfare has in fact made the public service look like exactly the thing its enemies claim it is. If you make the civil sector into a partisan battle, and play games with its funding, and spread cynicism about its motives... surprise you're going to get a partisan, inefficient, and cynical public service.