This is the first time i have ever heard the FARs accused of being vague. I have heard them called "uninteligible lawyer speak, overly complicated, too restrictive, and etc.... but I never heard them called vague. The FARs are only vague to people who dont wish to apply them and maybe I hit a little close to home for you. Sorry. I would hope your yardstick of safety was higher than "I have never had an accident". Remember what happened with Southwest and their POI.