John Yoo is somewhat an unusual case, and he was held to account to some degree. If you read the Office of Professional Responsibility Report section in that wikipage https://en.wikipedia.org/wiki/John_Yoo#Office_of_Professiona... you'll see that he had to go through debarment hearings and was almost disbarred.

A better example of these legal standards holding lawyers to account is Prenda Law: https://en.wikipedia.org/wiki/Prenda_Law

Honestly, I'm not sure they do a whole lot of good.