This is only a sculptors hope that isotropic equilibriums are Nature's answer. But it's rather cubic in the Axonometric views. But there is some evidence that this might be so. I haven't studied his program specifications, but i see some of his results are more naturally curved. And i refer to his relative efficiency of producing more life like twists and bends.
Natural bends result from equilibriums of stresses in physical materials like wood or metal.
A stiff physical wire does spring according to applied stresses. These stresses easily interrelate with volumetric wire frames, not singular, thin lines. The mentioned cylindrical tube could be equivalent to a triangle swept along a 3d line. But this doesn't bend the solid. This action would bend the whole tube in one direction.