In point of fact, you did:
Combing through my posts I see nothing that indicates I ever claimed that one round of 5.56 ammo would always do the job. Presumably you were just creating a straw man or maybe you simply misunderstood me? My research of wound ballistics is pretty extensive although I'm not an expert in the field, just an amateur. I've probably read the same things you have (although you may have professional connections that I don't, affording access to material that's not been published). Nothing I've seen published nor anything I've seen in the field back when I hunted regularly would ever lead me to expect a one-shot incapacitation. This includes big bore dangerous game rifles, shotguns with buckshot and heavy shotgun slugs.
If we're still trying to discuss the OP, I wonder if it's the only video you've watched by Rhett? I have long followed him. He's a wizard with many kinds of guns and very innovative, and I'd love to take a class from him. He also has a habit of staking out positions in one video only to advocate the exact opposite in another. It's sometimes hard to know what he believes and how much stuff he says just to draw views.