Fast heat does not penetrate. Effort applied quickly tends to cover the surface of a problem, which is the part that shows, while the middle remains exactly as it was. The result passes a glance and fails under any real use, and the failure usually happens at the worst moment.

Look at the thing you did quickly and ask where the middle is. The part you did not check, the assumption you did not test, the conversation you skipped. Go back to just that part with proper time. You rarely have to redo everything. The frozen section is usually smaller than the whole.