You wouldn't try to turn a Chihuahua into a livestock guardian, would you? Nor would you expect a rat terrier to be a herding dog. Different breeds have been refined though the ages for different purposes on the farmstead.
Is this not the same as these discussions where people want to raise fruit
trees grafted onto modern rootstocks as no-prune trees? As they say in Texas, "that dog don't hunt." You buy a tree that has many virtues from its rootstock, like disease resistance, anchorage, dwarfing, and then want to treat it like a seedling tree, which it is not and will never be. Sometimes the no-prune strategy is advocated for no better reason than "because Paul (or Fukoka or some other august permaculturalist deity) said." I'm not saying that the no-prune method is right or wrong. It's just not a tool that works in every situation. By not pruning and training grafted trees, you can lose many the potential benefits of the rootstock that you probably paid good money for, and to what advantage? Because you want to "let the tree be a tree?" We need to think harder. Not all trees are suited to that regimen. If you don't want to prune fruit trees, start with the correct tree for the job.
Perhaps this is just a natural phase of
permaculture where all the new ideas are so exciting. Swales! Hugels! RMHs! Herb spirals! We don't do a very good job of foundational teaching of how to select the right tools for the elements of a design. I surely have made plenty of mistakes out of enthusiasm without really thinking through whether the application made sense for my overall design. Learning the tools is the apprenticeship stage of most any craft. Why does a chef have an arsenal of knives? Which one to use when? It's a lot to learn, but learn it we must.
An unpruned
apple tree on a rootstock bred to grow no larger than 6' is like putting a Golden Retriever out to guard your sheep. Sure it's a dog, but nobody, not the dog, the sheep, nor you, is likely to be happy with the outcome.