Freedom of speech has its downsides, yes. My only point is to _add_ to the discussion, not _delete_ discussions. We have laws in place for defamatory speech and plenty of other exceptions. Saying false things about climate change or how "democracy" works can often be countered with basic facts. People will often still choose to believe fallacies at will and that is their right as an American.
You're disregarding the key distinction: Malevolent actors are (in Steve Bannon's words) flooding the zone with shit, which they're able to do at trivial cost. The rest of us shouldn't have to put up with that, forced to spend our time digging through the shit spread by those who, for their own purposes, want to sabotage our societal decision-making processes.
