Can you clarify what the difference between policy or law is at a given level?

Not everyone agrees as to where the line is for "common sense" and will definitely push boundaries beyond what a community would generally agree to. Laws at a higher level are just "common sense" codified.

There is so much in life that is deferred to someones best judgement that if we stopped just to annotate and attempt to codify all these 100 such actions each person in positions of power or authority might take a given workday, it would take a century.

Not all mountain out of molehill arguments need to be engaged with I think is the broader lesson we need for our times.