>Realize that no one wants all of those horrible dancestor clones running around. Then, immediately give up on true life's work.

Ok buster. So you don't agree with the idea of reviving the dead. Fine. Whatever. Hmm. Interesting.
But did you ever really even stop and think??
Would you want to have died at NINETEEN? Do you feel like you were finished living at that point? Did you get to have any nice character arcs? How fulfilling was your one year of adult romantic life? You get your most earnest dreams realized?
No. You're just a stupid kid at 19. You're just barely getting started. No one deserves to be done that soon.
You will be the one to make everything right. You will be the one to soothe their problems.
This is IT, don't you see?! This is the meaning, fulfillment, and ultimate application of your godly powers. Altruism! Love for the people, dammit! You are honestly? Kind of a total mensch!! And you are resolved to never in any way resemble the controller and tormentor of your childhood and teenhood, the recently thwarted genocidal troll empress, Seabitch Megahitler.
You're determined to spite her and everything you almost were, by being true to yourself and becoming the opposite of that. A Megamensch Neverhitler, who fills the world with abundant, joyous life.
Hence your quixotic mission.