“Don’t wear shoes in the house.”
Of course, if you came home to a fire and you ran in to save the cat, you wouldn’t be worried about the carpet.
Rules are imaginary. Agreements we make to make the culture run better. The problem with exceptions is that we can use them to justify bad behavior. Ignoring the spirit of it in the first place. We also use rules to create limits for ourselves. Which is no help either.
Some rules help us (cigarette companies shouldn’t be allowed to market to teens for obvious reasons) and others can be changed and adapted.
As a practice, I write every day. I guess you can call it a rule I live by. We can create rules that help reinforce a system that is working for us to create our best selves.