I don't think you understand Chesterton's point. It's not that hard to see it is valuable to know why things were built.
It's the same reason we study history, to know what came before us so that we can make good decisions going forward.
It's the same reason we study history, to know what came before us so that we can make good decisions going forward.
Since "Chesterton's Fence" can not be 100% applicable to every and any situation, you are rejecting it wholesale.