Principles are ways of successfully dealing with reality to get what you want out of life.
Ray Dalio, one of the world’s most successful investors and entrepreneurs, cites principles as his key to success.
If you keep getting bogged down in details, you either have a problem with managing or training, or you have the wrong people doing the job. The real sign of a master manager is that he doesn't have to do practically anything. Managers should view the need to get involved in the nitty-gritty as a bad sign.
At the same time, there's danger in thinking you're delegating details when you're actually being too distant from what's important and essentially are not managing. Great managers know the difference. They strive to hire, train, and oversee in a way in which others can superbly handle as much as possible on their own.