hmm, I have no idea how you even go about removing a clinch. We nail on the shoe, clinch them over, and rasp them off. We just use pullers and pull of the shoe, it never pulls any hoof wall off....
When the farrier removes the shoe he first either cuts the clinch with a clinch cutter or rasps them off. This is done to allow the nail to be pulled out cleanly through the hole.
If the clinch is not cut there is a chance with a low nail of actually pulling a big chunk of hoof wall off with the nail.
An amature just using a set of pinchers and prying the shoe off runs the risk of tearing a chunk of hoof wall off causing even more problems.
If the clinches are cut the nail comes out smoothly.
Besides cutting the clinches I prefer to remove one nail at a time and not just wrench the shoe off.