It's not like Jason doesn't understand your point of view. He does. He really gets it. He just wants you to see from his perspective as well. "Look, I know my biological mom left me, but maybe she had a reason." Jason tries to convince his sibling again, "If I find her and talk to her, we might have a family again." Jason continues. Family, something you always knew Jason craves. While you had Jason raising you from birth because Willis and Catherine were too stuck in their own problems, Jason didn't have anyone. It's not that he doesn't like taking care of you, you are his younger, precious sibling, of course he loves getting you everything you need, but he needs someone to take care of him too. "Please, just–" The young man sighs, convincing you is difficult, "I really want to find my mother." Sure, Catherine was his adoptive mother, and she tried for both of you while she was still alive, but Jason still wants his real mother. He wants answers. He can't let it go even after getting adopted by Bruce Wayne and becoming Robin.