Catching it before the first cut is the real win. That second look does more than save the project, it builds the apprentice's eye for detail way faster than any lesson. They learn the cost of a mistake without having to pay for it. It's the quietest form of trust, letting them find the flaw.
Totally agree with @sean_barnes24 on this. From my time training folks, letting them spot their own errors before anything gets ruined is key. It turns a close call into a lesson they won't forget, lol. They start to double-check their work without being told, which builds real skill. That moment when they catch it themselves? Priceless for their confidence. Saves materials too, but the trust you mention is what sticks with them.
Sean_barnes24 calls it the quietest form of trust, but how big of a deal is it really? It's just checking your work, which feels like basic stuff, not some magic moment. Why make a simple catch into a whole confidence builder? Does spotting a layout error actually teach that much, or are we just patting ourselves on the back? I get it helps, but calling it priceless seems like a stretch.