Anyone can be a parent. Kids need good parents. A child raised only by a male or one raised only by a female can turn out perfect if the single parent does a good job. A child will only start noticing the lack of the other half of the typical family parenting pair when he or she starts interfacing more with kids who have both, from one of each (M+F) or two of each (M+M or F+F).
As for a MtF crossdresser saying that they would not give up their experience or the opportunity for that experience of being the Dad, Father figure, in a family versus giving it up to be a female, I think it is based on the truly different roles and experiences each parent can get from doing that for their children and can give to their children. I think that a man successfully performing the male role as a father, playing male sports, fixing things, male bonding and all the rest, can and does get a special feeling and satisfaction that is unique to those who have the opportunity to perform those duties, married or not, male or not.
