You are making an argument against the First Amendment.
Yes, I am, because I find the idea that absolute freedom of speech does or should trump all other rights, freedoms and responsibilities to be dangerous, both in principle and in practice.
It is also contrary to both the letter and the spirit of the law just about everywhere. There is literally no country on the planet -- including the United States of America -- where you can say whatever you want, regardless of the truth of it or the damage it may cause, and be immune to any consequences in law. Life just doesn't work that way, because in reality words are very powerful things, and any such law would therefore be futile.
It is important to protect speech under some circumstances. For example, it is necessary to the successful operation of any civilised society that anyone is free to express their honestly held belief on a matter of political policy, no matter how unpopular it may be, without fear of legal sanction. Indeed, one of the very few situations here in the UK where essentially absolute freedom of speech does apply is when Members of Parliament say something in the House.
However, that example is also a good demonstration of the danger of placing freedom of speech above other laws. We have an election coming up, and we've recently seen some very dubious allegations made against political figures from rival parties under cover of parliamentary privilege. Naturally, those allegations go straight into the headlines regardless of any truth or otherwise they may have, potentially affecting how people will vote at the election. The most the alleged tax dodgers can personally do in return is challenge politicians to repeat their claims outside of Parliament, where they would be subject to the same defamation laws as anyone else, but funnily enough you don't see a lot of headlines when a politician does not stand by their earlier claims in that way.
In any case, protecting intentional falsehoods is a very dubious path to follow. Why should deliberately misleading someone and consequently causing them harm not be subject to penalty and compensation in law like any other type of deliberate harm? What moral, ethical or other practical justification can there be for protecting someone who, for example, claims to be a doctor and writes a trusting patient a false prescription for a drug that then kills them?