There
is a fine line, and I think that's easily illustrated with a few hypothetical counterexamples.
If you truly believe that "free speech is about not being dragged off in the middle of the night and sent to a gulag", and that that's all it's about for you, then would you, for example, be okay with a law stating that social media companies in the US are required to automatically filter any content critical of actions taken by the US military, and not display that content to people inside the US?
Yes, that's an extreme example, and yes it'd be illegal under the current US constitution, but it would be consistent with the extremely narrow definition of Free Speech you specified in your previous comment.
So, assuming that's not actually where you draw the line, where do you draw it? How much suppression of speech are you willing to tolerate before you would consider it unacceptable?