Ooh, that is an interesting concept. I've always thought that Jason's death was devastating for Bruce at least in part because Jason was the first child he adopted, which then fed into his later reluctance and guilt when it came to officially adopting Dick. Maybe he himself was questioning by then why he hadn't adopted him to start with, which I still would chalk up to Bruce being too young and self-absorbed at the time to really think of himself as Dick's parent in that sense.