Raising children is more of an accomplishment and service to society than anything any government has ever done in history, today, or at any point in the future.
Your equivocation between straight and homosexual couples raising children flagrantly disregards any sense of practicality or morality.
I have a gay acquaintance who personally told me gay people should not be allowed to raise children. I'm not sure which of the many, many reasons he had in mind when he made this claim to me, but please respect that homosexual guy enough not to slam the door in his sensibilities there.
Many statistics have show that the average homosexual relationship is incredibly short. Months. Weeks. That is no place to be raising children. I would never want to be raised that way. Are you saying you would?