I think it’s odd, but to each their own. However, I do hate the notion of “I birthed the baby, so I get the final say”. There was no choice in who gave birth to the baby/was pregnant unless the couple is a pair of equally fertile lesbians. How would most women feel if the guy said “Fine, you get the last name, but I get to pick the first and middles of all our kids because it was my sperm that gave the X or Y sperm”? The mother has no choice in that and I’m sure most women would be offended.
Women know the child is theirs. Guys assume the child is theirs.