We can't send to jail, the same people the government previously praised as being national heroes. Discrediting him afterwards would also mean discrediting the government who didn't do their due diligence. So they'll cover for him in order to protect themselves. It's a story as old as humanity.
We (thus far) have not been able to send him to gaol because the civil standard of proof is on the balance of probabilities but the criminal standard is beyond a reasonable doubt. Ben Roberts-Smith has been shown to have committed war crimes on the balance of probabilities, but not beyond a reasonable doubt.
I think that the government would probably prefer he be locked up, since the current situation is the worst of both worlds: he is legally a war criminal, but remains embarrassingly free and unpunished by the criminal justice system.
I don't think I've read a wikipedia article about a person before that is as clear'n'cut as this is in detailing what an absolute shit the person is. Usually there is some back and forth arguments, but this is just straight up murdering and girlfriend beating asshole all the way.
He sued for defamation against the media organisations who exposed him and he lost _hard_. So all the facts that might ordinarily be in dispute and have tiptoe-around language to avoid being sued for can be stated plainly.
He has a Victoria Cross (Medal of Honor equivalent), you basically have to be mental and not care for your own life to get one, so we shouldn't turn around and be shocked when they don't value the lives of the enemy and their supporters.