Cows tend to pass where other cows passed. Herd behaviour. Something like a real world effort optimisation.

No use trying to optimise in a week using one brain something that found a local minima (or maxima) over years and multiple people.

Normally the change (and effort) to achieve a better minima (or maxima) has to made on a variable you just can't see or imagine.

Something on the line of Chesterton’s Fence.