There will always be miscreants in all different types of societal structures. It's not necessarily up to he individual to tame nor deal with these types. Tax money is paid hopefully government institutions invest properly in avenues of behavioral correction. If things are out of control then perhaps that area of investment needs to be looked at. Skilled law enforcement is always better than emotionally charged vigilantes. IF it has to come to that in the first place...
You truly live in a perfect fairy tale world. I'll address a couple of your stances.
What would it accomplish? If the victim in this case was to pull his CCW and plug the thief, it would accomplish many things:
1. It would would prevent, or deter this man and his friends from ever stealing a bike again.
2. It would prevent them from thinking they can push around anyone they want.
3. It would make local or national news, therefore educating others of the fact that you can't just take peoples shit without major repercussions.
You also state that it is not up to the victim to tame or deal with these types of people. However, you forget it is our goddamn right. How would you feel if these thugs were performing the same act on your sons bike? Would you shrivel up, call the police, and wait for them? If you said yes, then you really have no sac at all. If anyone ever threatens your life or property, it is your right to sort that shit out right then and there.
Also, you state that this could have been prevented if the proper risk assesment had been taken. Again, maybe in your perfect world. However, criminals are opportunists. Crimes even happen in some of the nicest neighborhoods. You cannot always prevent criminals from taking your liberties. This is why people have CCW's. It's a form of risk assesment. I cannot predict what is going to happen everyday, and I cannot prevent criminals from trying to steal or harm me. Therefore, it's in my best interest to be prepared for situations like this. If I were the victim in the video, there wouldn't have been a video, and the entire conversation would have been short and sweet. I'd simply say, "That's my bike, and you're not taking it." I'd then flare my shirt, and show them my sidearm. It would all be over in 10 seconds, and they would leave with a new found education of, "This crazy fuck could have just shot us. Maybe we should think twice about stealing bikes in the future."