The bomb was powered using the kinetic energy of the human body, so it could last a lifetime without any power failure.
Also, Hilda definitely would not be willing to hide away forever because her personality would not allow her to do so. She did nothing wrong, so there was no reason for her to avoid everyone for the rest of her life.
Or maybe, they could use the power of the Clemon and Damian Families by asking the government to intervene, but it was too big of a risk because they couldn't trust them.
Therefore, it was extremely difficult for Connie to choose because in every choice, she had...