This is the 101 section for arborists, populated by experienced arborists helping less experienced arborists on an arborist website. Arborists should like trees. I go by industry best practice, regulations and experience, I would say we are open to new ideas but not ones that we know are wrong. Yes, some trees TOLERATE pollarding/topping and some trees tolerate spiking, the same way some people tolerate amputations and gunshot wounds. Just because they don't die doesn't mean it's good for them. I have yet to see a pollard that I like the look of even though I understand why they're done, London plane tolerates pollarding but any tree is happier if it doesn't have the **** hacked out of it, yes there are many pollarded trees but could it be done another way? Depending on species, probably. I have a friend who is a boxer, he can tolerate a good kicking, does that mean that he needs a good kicking regularly? Maybe I should organise a Maori to mangle him once a year or so and then tell everyone how good it was for him and how good he looks a year later, just in time for his next kicking. As far as I understand it original Pollarding is Coppicing but 2m/6'off the ground to stop beasts eating the regrowth, they were both used for producing a constant stream of timber of all sizes for uses from walking sticks to fence panels and building materials. If you go over a certain stem size then the chances of healthy regrowth diminish and you can lose the tree.
I worked on an old estate garden in Sussex where half a dozen apple trees and a yew were hacked in half by a moron, they survived and grew on, years later I am pruning them and what do I find? The apples are in beautiful health, although covered in epicormic shoots, the big problem is because they were topped the rot had started spreading all the way down the inside of the trunk, in fact one was so hollow and full of compost that I planted trailing flowers in all the flush cut rot holes up the trunk, now it's just a matter of time before they fail and for no other reason than some muppet had an idea. The Yew was the same but less advanced. Maybe the people here who's responses you don't like have first hand knowledge of why we prune the way we do. I hate climbing old regrowth on a badly pruned/topped tree, they're dangerous, fact. They also look like crap. Didn't Shigo talk about a trees dignity?