envisioning a bunch of federal workers knocking on your door

it's trusted messengers who are part of the community doing that – not government officials

If someone is employed by the federal government, they are a federal worker. They may not be a "government official" (whatever you want that to mean at the moment) but that is a completely separate issue and conflating the two is just playing games with words.

Also, given the history of "locals" collaborating with authoritarian regimes it doesn't really mean much, does it?

We are steadfastly committed to keeping politics out of the effort to get every American vaccinated

Right, because invading people's private SMS messages isn't political?