Well, yeah. There is the potential for a really bad set of natural parents and a really good set of same-sex parents. What sort of problem do you have with this?
It's supported by study. If it's not debatable that's because it's correct.
I don't think there's any sort of belief required. The fact that it's possible for bad natural parents to exist and good same-sex parents to exist should be evidence enough that this could happen.
Ignoring the fact that this is wrong for a moment, are you saying that parents who are forced to use surrogate mothers (because of the woman's sterility) won't be able to feel the same love for their child? Is that really what you're saying?
I'm pretty certain that this is not the case.
I think you'll find that, where same-sex parents are concerned, the child will identify with one of them in one way, and with the other in another way.
Your preconceived, religiously-fueled notions are not supported by study. You're guessing here, and guessing wrong.
We can already do that.
What do these religious arguments have to do with refuting the study shown earlier? Or have you suddenly switched from trying to rationalize your viewpoint to defending it with religious belief?
None of these facts are obvious, and most of them are not facts. The facts are what was discovered in the study referenced earlier.