As someone who grew up without my father, who met siblings for the first time when I was an adult, I have to say that knowing who your family is really helps you figure out who you are. Biology is not destiny. But seeing how pieces of your biology worked out under different circumstances really is valuable.

That said, while connecting with the father would be likely to help the daughter, I'm not so sure that the father owes that to a stranger he never wanted in his life. I suspect that if he could bring himself to do it, it would be good for him to find out what he's been paying for over the years. But it would only be good if he was able to connect.

And that can't be forced.