I rather agree with him, in principle at least. I think way too many people get caught up on the whole "being alpha" thing and feel it is there right to do whatever they want, whenever they want, and the dog should just accept it, but don't realize that if they're going to try to take on that role they need to respect the rules that go along with it. And one of the rules of canine social order is "finders keepers" and it is considered rude and inappropriate for a higher ranking member to take food away from another, and if they try they should be prepared for the other to defend it. People try to be like other dogs in that sense, but then don't follow the rules and go balistic when the dog does something like defend his food that is well within his rights to do.
I've also seen a lot of people so intent on preventing resource guarding issues with their dogs that they inadvertently caused them by constantly pestering and bothering the dog when eating. What to the human was meant to desensitize the dog in actuality backfired and created a dog who got uptight over the owner doing these things because in his mind he was always harassed and never left in peace.
Every once in a great while we will pick up our dog's food or reach toward the bowl, always giving it back and usually putting something even better in there so if anything they associate our intereference with positive things. But we don't make a habit of it. For the most part they are left in peace, and they expect to be left in peace so they don't get worried or cranky when we approach because they don't expect anything bad to happen. If we do reach for the food, it is a odd, strange occurrence, not something that makes them feel "ugh... not again you stupid human!", that has a neutral or even more positive outcome. It is never seen as a bad thing.
We can take food away, toys away, bones away, anything away from any of them without any problem. But I think a big part of that is because we do give them that respect, have never given them a reason to feel insecure about eating or having something in our presence or a reason to expect us to harass them, and on the rare occasion we do take something away it's no big deal.