And yet with this primitive outlook we are stuck with fake news horse shit spewing all over the internet. We need a more robust approach to improve discourse.
It absolutely is the job of the government to regulate interactions between its citizens. That's literally why people let them exist. We're arguing here about extent of that regulation.
No sane government will prevent you from generally moving around. But try to run around the town naked, and see how long it'll take before you get in trouble. Being naked is a form of expression too - one that's almost universally frowned upon when not confined to private spaces in presence of adults only.
(Also, no reasonable government is tone-policing discourse in general. Some governments choose to demand respectful behavior towards the institution of government, including in particular towards officials while holding office. That's a far cry from being oppressive or constraining the marketplace of ideas.)
I must be able to say whatever I want, and you must be able to ignore me or openly disagree.