On (1): yes, that's the idea behind the independent role of the judiciary. They're supposed to be quis custodiet ipsos custodes. Sometimes, it doesn't work out, but usually it does. I'll concede that there's gray area here, but not quite enough to make the argument non-coherent.
On (2): the government can definitely say things (the White House literally has a Communications Director), but also (and more importantly) both stifle and coerce speech. I'm not sure how you came to this second conclusion.