This view vastly underestimates the ability of a completely wrong party to sue for slander. In the US at least. You see this with pseudoscientific snake oil salesmen all the time.

>Anybody can sue you at any time for any reason.

Which is neither here, nor there, as some are more likely to sue you than others.

>For libel and slander cases though, telling the truth is a valid defense.

Which is neither here, nor there, again. Not everybody wants the hassle of going through a lawsuit or the time and money costs associated, even if they have a "valid defense".

In theory, but assholes often aren’t creative, and justice system is as it always had been, so,