You may have misread, the wiki says her plan was to 'seal', not 'steal' the passageway between Earth (or Gensokyo) and the Moon. Eirin deliberately chose to bre

You may have misread, the wiki says her plan was to 'seal', not 'steal' the passageway between Earth (or Gensokyo) and the Moon. Eirin deliberately chose to break her connection to the Moon in order to protect Kaguya.