Maybe he just has a really good shortcut?

Setting the clinch higher on the inside is a common fix for a horse that brushes or interferes, but it doesn't really address a shoe pulling off in straight draft work. That's usually about nail placement and the shoe's fit itself. You might be putting the nail in a weaker spot in the wall by moving the clinch. For a heavy puller, I'd look at spreading the nails out more in the heel quarter first.

Yeah, that "saving time" trap is real. I once tried to batch cook a week's meals but used the wrong lid. Everything steamed instead of roasted, turned to mush, and I had to order takeout. The worst part was cleaning that sticky pot for an hour. Sometimes the shortcut needs more setup time than it's worth.