“I don’t give much weight to his “certified” status for his involvement.”......
Being a good shot or being “certified” has NOTHING to do with being a good Samaritan who happens to be a good shot as well. Carrying a piece of paper (certification) does not mean he wasn’t “qualified”.
Exactly my point about the piece of paper or certification - the real qualification was the willingness to get in the fight and recognizing it was up to him. There are all kinds of “keyboard commandos” on the various gun boards who would counsel not getting involved for fear of an attack by a horde of lawyers.