I kinda agree with you but remember these are not social dogs he deals with. They are already aggresive and a danger to other dogs and people. Drastic measures are often needed to change a dog. I wont "choke out" my new puppy but I will use the submissive technique just as I did my adult Dobe and she knows her place as well as the new pup will know his. BUT they had a clean slate to begin with. They were not endangering anybody to start with so more aggresive actions were not needed.
His methods work for many and many it does not. And no he has never rendered an animal unconsious on national TV. You think he would have a show still honestly. PETA would be all up in his junk. If he did do that to a dog Im sure they would edit it out. The techniques have worked for me as asking your dog politely may work for you.
I spank my kids, so now Im a bully and act barbaric. But at least my kids dont act like satans offspring in public like countless kids I see everyday. Dogs sadly enough are not too much different.