Glad he is ok! Physically. Him having that anxiety can be a good tool for him when he does saddle back up on another bike. It should pass leaving the wisdom of possibilities. Giving him more respect for the road. Mind you I'm not saying he didn't have enough to begin with,just now he has more. Can never have to much of that.
Not sure how shaken up he is,but try to keep him occupied. Like now is a good time to ask for help to complete one of those projects around the house that wives usually nag about never getting done cause we on our busa's to much HAHA! Basically Misdirection of the mind.
Good luck! Hope for a fast recovery!