The stats on PTSD are pretty overwhelming re people who have been involved in violence. This is an appropriate day for you to think about that.I drove drunk on several occasions when I was a teenager. Luckily for me, I didn't kill anyone. Had I done so, I would have quite rightly expected to pay the price. I didn't consciously drive down a crowed street of MADD protesters to challenge them on my right to drive drunk.
As far as his life being fucked. Far from it. He looks pretty damn pleased with himself and he is getting the folk hero treatment from all and sundry. He won't be having PTSD or nightmares. Put down the fucking violin.
You're obviously missing all the points re self-defence, so I won't belabour the point.