I can understand why you would not go back. I hated picking up the phone after releasing software into production that was used by the bankers and others on the trading desks. When something went wrong, I knew that when I picked up that phone I was in for a grilling. So I can fully understand.
Ask those trade workers how they like their jobs and if they had a chance to go back and do things over, would they? I'd bet 9 out of 10 each one would say they wished they did better in school to avoid being where they are today. Those are shit jobs. Nobody really wants to be a plumber or a floor or sheetrock installer.