People often seek to have a set of rules for life for obvious reasons. If we can have a set of rules then we can predict our future instead of coping with the uncertainty of results for our actions.
People can often create rules which when viewed by others make absolutely no sense but which they cling to despite evidence to the contrary. They develop a blind spot in their thinking and observations of the world around them.
Rules imply control and a comfort zone for people that they need but at the same time it ignores the interaction between people that changes events or events which are generated by others.
We don't like uncertainty.
Perhaps we need to recognize that life is not about control and rules but about choices in each and every moment. The quality of our life is determined by our choices.