The point it is to BREAK ALL FOOD AGGRESSION no matter where it is. Stop talking like you can speak for everybody. I got real apbt and a Doberman right now. I’ve had Malinois, Rotts, Corsos and nothing but.
I feed my dog how I want to feed my dog, wherever I decide to feed him. Their kennels are MY KENNELS. Yes it’s a safe space but they don’t go in it unless I ALLOW them in there. The toys they may fight over are MY TOYS and they understand that. It’s why they don’t fight over them. I have a basket in the corner with toys and they come to me to ask permission to play with the toys. Ain’t shyt in this house theirs. It’s all mine. They understand that. So there’s no “I’m aggressive because this is my food in my kennel that no one else can have”
I can feed two dogs in the same kennel with no issue if need be and there’s no aggression. From the moment you have them, I break any and all aggression inside my house for any reason whatsoever. If I raise my voice, every dog in the house looks around like “

”.
So what works for you, works for you and is by no means some standard of training. I’ve never been bit or growled at by any dog of mine and the only one that showed aggression towards food with other dogs was a rescue that quickly got that broken by me and my Malinois.