Hmm, I guess I'll be the dissenting voice, then.
Frankly, what he's saying is exactly what I've been saying for years (everything in it's context), so it's hardly a revelation. But even in that, Irvin needed to have it explained to him? The best I can see is that, despite having a range of arts in his background, all he'd ever done is go from drinking one kool aid to another flavour. Additionally, the story the elder gave him is filled with misunderstandings and blatant errors (kicking people off horses? Does he seriously believe that old wives tale? As far as the take on what BJJ is for, that misses the point as well... then the FMA story? Once more, simplified to the point of inaccuracy). And honestly, I'm not impressed with the knowledge of someone sho thinks "kung fu" is a single martial art, and doesn't have a clue about what he was learning there (in reference to the quin-na, and more). And seriously don't get me started on his "Japanese Quin-na" story...
When it comes to his take on self defence, it's not terrible, but there's still quite a few gaps. And while I'm very happy that things worked out well for him in his invasion, what he did was incredibly dangerous, as (by his words), he moved as the gun was being pointed towards where his wife and son were... I hope they understand what he did there. Additionally, his take on the various arts is based almost entirely on the physical aspects, and as such, his view of each and every one of them is very limited and flawed, as demonstrated by his list of what "didn't help him" and what did. Bluntly, he didn't get what he was being told, and doesn't get how to train things to adapt them. Any one of the things he said "didn't help" could have helped as much as the ones that did. He seems to be presenting the idea that you need to train for every single possibility and eventuality, even though that's an impossibility (such as the idea of training a gun disarm for 20 years but having nothing when it comes to knife defence).
Honestly, his reality needs a reality check as he's missed the point.