"Because if I don't try, then I might as well be hurting him too."

Simple as that. No good person would willingly let things come to some awful end. No person with some kind of strength or power or the desire to change an outcome would just sit there and do nothing.

"You don't know how this place or Geardagas might've changed things. Neither of us do. But if you think I'm going to sit on my ass and do nothing... you're stupid! You and your not-dream-self!"