One thing I would say is that while it might be true that truth eventually finds a away, the lies can do a lot of damage in the meantime, and can in fact be used to prevent the truth from coming out.
For example, take fascist propaganda... the lies are effective, and if left unchecked, can convince people to support fascist leaders, who will then block free speech, preventing the truth from winning out.
Perhaps the fixes for the problems we have shouldn't involve some patchwork bodge to the laws that align our principles but should instead start at investigating why we need these bodges in the first place? It's an unthought out idea but between existing slander laws, a reasonable expectation of common sense/reason from your average citizen and a lack of corruption in government; I'm wondering if setting up the systems to ensure those aforementioned areas are solid would take care of the free speech problems for us.
> a reasonable expectation of common sense/reason from your average citizen
Half the US has voted for someone explicitly denying science, half the UK has voted for Brexit, in some areas of Germany 25% vote for people just a few beards short of Nazis, Bolsonaro is still in office. The "average citizen" can not be trusted to vote in their own interest or in the interest of the future generations.
For example, take fascist propaganda... the lies are effective, and if left unchecked, can convince people to support fascist leaders, who will then block free speech, preventing the truth from winning out.
This is a form of the paradox of tolerance..