All Pruning is Dwarfing
That is one of my favorite "true lies" in horticulture. I've seen it so many times in university based guidelines about pruning, often accompanied by photos of the comparative size of young trees either pruned or not.
It is invariably stated as an absolute fact, which is too bad because it is often necessary to prune bearing age trees and bushes in a manner to stimulate vigor in order improve the quality of the fruit or sometimes just to get them going again.
Yesterday I was pruning some blueberry bushes that had been lingering in pots for years and forgotten in my nursery until I put them in the ground last year. If I left them as they were there would be little chance of their returning to vigorous growth. They are small plants with lots of flower buds and just a few short shoots of last years vegetative growth.
One kind of pruning that stimulates vegetative growth is when you remove spur wood (the crooked short pieces loaded with flowers), preferably back to an upright vegetative shoot that grew the previous year. This is what I did for the blueberries.
This works better than simply removing flowers because spurs continue to be a big energy sink as they build blossoms for the following season.
When I'm pruning through orchards the first thing I evaluate it the relative vigor of a tree. A tree that is barely growing can often be brought back by reducing spur wood and any wood growing horizontally or below.
The part you can only learn by doing is evaluating how much spur wood to leave, but when a tree is seriously runted out it is hard to remove too much. Better to get the tree growing again and train it back to fruitfulness then to leave it in that state.
Proper irrigation and nitrogen can also help, of course, but pruning for vigor is a valuable addition to managing fruit trees that is not often discussed.