That's often about how he feels about it. He doesn't blame her. But it means he's out of ideas that don't horrify him. And he's afraid she'll hurt herself at this point. He's very sure he couldn't restrain her if he tried. She's much more used to fighting than he is and, he has to assume, fighting effectively, not elbowing and flailing free of a barfight. He has no way to reach the captain--what he wouldn't give for a comlink. Just trying to get someone else's attention has some promise, but he could upset her more that way. And, while he hasn't seen any evidence of violence here, but he doesn't really know most of the people, and he wouldn't trust Jyn to anyone but Cassian when she's defenseless.

Which means he needs her to go with him willingly. And he only has one thing left to try. "I'm not anybody's best. I'm more of a least worst option situation." That's not the hard part. He closes his eyes for a moment, recalling the words that brought him back to himself enough to get up and move. "Galen's. I'm your father's." He never intended to mention the man in front of her. He's distanced himself as carefully as he could every time she's brought him up. But if it'll get her to follow him to safety...