Your x-T knows exactly what he did. This psychologist in your corner trying to force a re-think sounds bazurk. Seems like an unnecessary step, unless you're really set on sitting with this x-T again for 5-10. You've said atleast once you want him struck off or to face severe penalties.

The penalties are only possibly going to happen with the complaint and legal avenues(if there are any) if you choose. Hope this psychologist isn't giving you false hope thereby setting you up for more pain.

Without the complaint or legal avenues I don't see forcing anything and even then it probably would be force closure sessions with you. Legal might equate to financial compensation if there's basis...Im not a lawyer. And his governing body/bodies depending on severity they deem I'm not sure the consequences but not likely gonna be forced interaction with you. Given the damage he's done already by his actions they won't want to be responsible for further damage by forcing him to interact with you.

Chances are he has some idea that is probably the case so I highly doubt he'd willingly conceed closure sessions.

ETA: Of course this is much easier to say when I am not in the emotional depths of the situation.

Hope you find peace and closure in time regardless of impending actions you decide to go with.