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Two most likely situations if the guy had been OC.
1. shot outright because they could see the gun as they pull up.
2. bad guys would have gone on looking for an unarmed victim.
None of us can predict which scenario would have played out. After these are bad guys that don't give a damn and probably high on something or desperate to steal some money so they could feed their addiction. (Yes, you can speculate, guess, pull it out of your ass, but you cannot say to a certainty)
There is no perfect approach to self-defense, and both CC and OC win and sometimes loose in these situations, either preferable to being unarmed and totally incapable of defending your life.
This is not an OC/CC issue but as stated above a situational awareness issue, and does not further the argument of which is better.
4 male teens asking for directions? His SA meter should have been way into the danger zone. That's when you get distance between yourself the the possible threat, such as placing yourself on the other side of one of the vehicles (there were at least 3 there).
Of course what the teens were driving, or their race is not provided in the article or broadcast news.