During the quest "Blessings of Nature," the pilgrim who prays for a sapling points out that "the true blessings of nature lie in renewal, not slavish maintainance." So doesn't that make stopping Alduin (and preventing the next world) no different than svcking the sap out of the Eldergleam, or sacrificing innocents to gain immortal vampirism from Molag Bal - sustaining the current kalpa with slavish maintenance?