Hatracking also takes away the tree's energy-producing canopy and causes massive regrowth at each cut. When you cut back one branch, it comes back as three or four. This holds true even in the largest of trees. The weight of several new branches can be substantial, creating a dangerous canopy for trees in a hurricane zone. It is not necessary for a tree to look pruned.
Every cut causes some amount of damage.
Therefore, a competent pruner removes as little as possible, making only cuts that will benefit the tree in the long run. The art of pruning requires intelligent decisions from the very beginning, starting with choosing the right tree in the first place. Outside his window he wanted a tree so small that he could always see the entire plant. He planted a Senna polyphylla, a yellow-blooming tree which grows no taller than eight feet. He has never had to prune it once.