Saving someones life takes less effort than drinking water?

Faced with such a nonchalant question, the adventurers hesitated. If they tried to leave the dungeon with the girl in her current state, surviving would be hard, but there would still be a chance. However, if they trusted this man in front of them, maybe she could live, but who knows what might happen. Although the beautiful woman had saved them earlier, they couldn't trust her. Why would these two people be so inclined to help them? Was it out of the kindness of their hearts, or was there something more to this?

To believe they were saved out of kindness would be naive, and even if that could be the case, they would never assume that to be the truth. Ark could discern that they didn't trust him pretty easily, and since that was the case, he decided to just do it whether they wanted him to do so or not. Saving someone ungrateful or hateful was one thing, but these people were just cautious, he would behave more or less the same way they did if he was in their situation.