You know she NEVER thought all of this through One tiny town is easy. All of Equestria is another matter. What did she think Celestia and Luna would do, roll over and give up? We've seen Luna pushed over the edge, but NEVER Celestia. Then theres Discord. What happens if he TRULY gets angry. Her magic woudnt have any effect whatsover. Pushed to it, he culd destroy Eqestria to stop her.