Luz was thinking about this ALL the time. It would be so much easier if Hunter had the same memories she did, but he was still under the thinking that Bellos had his best intentions at heart.

"No, that wouldn't work," Luz said, shaking her head. "I can't do that. I'd hurt too many people, and anyway, I need to be around to go back. There's still things I have to fix. HE is one of them."

As far as she was concerned, she hadn't been able to stop him from sinking into Bellos' memory or save him from this, so she was already 0-2.