This is not how things ever work in practice in representative democracy. The world is too complex, and the many overlapping sets of political groups in a country/provice/city have different takes on what the policy should be, and more importantly, each group have different tolerances for what they will accept.

Because everyone has different principles by which they evaluate the world, most laws don't actually care about principles. They are simply arbitrary lines in the sand drawn by the legislature in a bid to satisfy (or not dissatisfy) as many groups as possible. Sometimes, some vague sounding principles are attached to the laws, but its always impossible for someone else to start with the same principles and derive the exact same law from them.

Constitutions on the other hand seem simple and often have simple sounding principles in them. The reason is that constitutions specify what the State institutions can and cannot do. The State is a relatively simple system compared to the world, so constitutions seem simple. Laws on the other hand specify what everyone else must or must not do, and they must deal with messy reality.

The principle is that you should be able to casually document what you see in public, but you should not be able to intrude on the privacy of others.