Hannah would absolutely agree that they're being idiots. This is one of the more foolish things she's ever done - and there's a long list of events to choose from on that list. The Resistance's survival depends on destroying the base (with or without her on it!) but having the chance to talk to Ben is just as important for Hannah. When the temple was destroyed she didn't have the chance to step in and intervene, making this the only opportunity she might get to sway her son.

"I'm going to take her with me but I've been waiting to bring you back home for a long time." She's regretted ever agreeing to allow him to go off to train with Leia. Maybe if he'd stayed home they could have protected him and Jane too.

She watches him carefully, keeping the distance between them. "I know you. This isn't you and this isn't where you belong. Snoke can't be trusted."