I don't know who you think the "real family" is but a) narrowing what a real family is does an awful disservice to a whole host of unique families, not just families that involve surrogacy and b) nearly all surrogacies in the US are gestational surrogacies where at least one parent is genetically related to the child and the surrogate is not at all related to the child (not that genetic relations is what makes something a real family or not, but I'm pretty sure thats what is implied here).