There's absolutely a distinction between government and private action, both legally and from a practical, moral point of view. But that doesn't mean all of the underlying issues are different, and the way we see one can very easily influence the way we see the other. I have two primary concerns. One, it's only a matter of time before someone gets cancelled unjustly. With literally 0 safeguards in place, that is an inevitability, and there's no clear way for someone to clear their name. Second, and related to this, the whole idea of things like the First Amendment was to protect unpopular speech, i.e. things that would make people mad. We often think of it as speech that was ahead of its time, but that's not exclusively where it applies.