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.
I often hear people complaining about a particular outcome without attempting to understand the machine that caused it. In many cases, these complaints come from people who are seeing the cons of some decision but not the pros and don't know how the Responsible Party weighed them to come to a decision. Since all outcomes ultimately come from people and designs, asking yourself "Who should do what differently?" will point you in the direction of the kind of understanding that you need to actually change outcomes in the future (versus just chirping about them).