Moles are carnivores. They eat worms, grubs and adult insects in the garden. Damage you find on plants is unlikely to have been made by a mole. Voles on the other hand do eat plants and they use mole tunnels to navigate. That makes moles undesirable because they pave the way for the voles to your juicy bulbs, potatoes, rhizomes, grass and even tree bark after all the lovely garden bulbs are gone and when the grass is in winter dormant stage.
