The very substance of your original argument is that the power to restrict these things is inherently dangerous, yet you don't seem to apply that standard in current cases where the acts of communication are criminalized.
Accordingly, your original argument falls flat based upon your own argument; the government can criminalize some speech and you don't seem to have an issue with it where it's obviously pro-social to do so.
So, again, work a little harder on refining the original position - the absolutist approach of complete governmental restriction doesn't exist in real life.
If you want to try redefining speech to only include vocal discussion between two people (which very much is not what freedom of speech entails), you'd still fall flat on almost all of the fraud related restrictions mentioned above in my previous post.
Anyways, that's all from me on the topic, the substance of the reply ignoring literally every area of nuance and actual productive conflict is just nauseating. It's like watching some tech guy tell a banker how bonds should work.