the only thing that is in dispute is what Freddy is labelled as on the birth certificate. I appreciate that there is disagreement there but it probably doesn’t make a whole lot of difference to day to day life.
Just being pragmatic for a moment, if Freddy had won then on the legislation as it's drafted at the moment, it would be practical disadvantage in day to day life. That's because the law for fathers is set up around their relationship with the mother. So as an unmarried father Freddy wouldn't be able to register the birth because only the mother has the right to do that. Freddy also wouldn't have parental responsibility because that requires the mother to agree to put the father on the birth certificate or make a formal agreement. If there were no mother then none of this can happen. Of course as Freddy's case was already at court then that could have been sorted out with court orders in this case but what about then next transman who gives birth and can't register the birth because there is no mother. What if a transman gives birth and the doctors want consent to give the baby important treatment but there is doubt because whilst a mother gets parental responsibility automatically at birth an unmarried father doesn't.
Freddy being registered as mother causes no day to day disadvantage and doesn't stop Freddy from being called father in every other situation.
The whole system around recognising parental relationships and responsibility is based on there being a mother. If that's going to change there needs to be a careful analysis of the knock on impact on all the other legislation and not an ad hoc decision that disadvantages children in this way.