Well if you’re goon get biblical, remember that Moses was in fact (or fiction) adopted as a baby.
But
Men should not be given the opportunity to avoid their duties as a father
And further, children should always have a right to know who their parents really are.
If you’re giving sperm, then you are not being a father, you’re just providing a biological hand, as it were.
And WHY should children have that right? Many of us don’t and many of us have the wrong information, like the girl above. It’s a bit of a Pandora’s Box.