To be clear: Lawyers are held to a higher standard of conduct for the purposes of performing their jobs as lawyers. Giuliani could be disbarred for this almost certainly, etc... Lawyers are very much not held to a lower standard of criminal proof. They sit as defendants in exactly the same way and for the same reasons that we all do.

I think what you're trying to say is that the argument about malice is easier because as an attorney of record on cases involving allegations against Dominion, he "should have been" in a better position to know the truth than a layperson repeating the same nonsense.