You discover an old rule that seems completely unnecessary.

So you remove it.

A week later, you discover the exact problem the rule was created to prevent.

That is the point of Chesterton’s Fence:

Do not remove a rule or process until you understand why it exists.

This does not mean outdated procedures should remain forever.

It means change should begin with understanding. What problem existed? Who was affected? What risk was the process addressing? Is that risk still present?

Once you know the purpose, you can improve, replace, or remove the process intelligently.

Some fences really should come down.

It is still useful to know what was once on the other side.