Those are arguments about shaming _inside_ parliaments and courts, which are obviously controlled speech environments; that has limited effect _outside_ courts, with the exception of sub judice rules.

> well developed traditions against name-calling and insistence on respectful language and behaviours like using proper titles (which can be a bit off-putting seeing how politicians act outside parliament)

Indeed. You can call your opponent a terrorist criminal just fine as long as you step outside the building first.

For a given dispute the court is certainly more likely to find a just result .. if you can afford to litigate. Or, in the case of criminal law, if the prosecutors will prosecute. If they won't, you can only resort to "the court of public opinion", i.e. shaming.