There is nothing at all to suggest that "this is how it is meant to work". The only reason that men and women are supposed to bring different things to a parental unit is because of spurious gender roles that have been systematically drummed into us for centuries. There are plenty of families where the mother is more disciplinarian and the father more nurturing and vice versa and there is nothing to suggest that a same sex couple would not bring every necessary element to child rearing.

I too was raised without a father and turned out pretty well. For a while my mother had a boyfriend and, even though I hated the guy and he and my mother fought all the damn time, I wanted it to work out just because I wanted my mother to be happy, which would have given me a more stable home. Later I realised that my mother didn't love this man and my home would have been more harmonious without him. Lo and behold, it was. Now if my mother had met a woman she fell in love with, who loved her and me and my sister and wanted the same things as my mother, that would have been fine by me. Two happy, loving parents of the same sex or so much preferable to a het couple who hate eachother, yet whose side is the law on?