Every child a natural right to be begotten, borne and raised by his or her natural, married mother and father.
**Well, I was adopted so the choice about being raised by natural mother/father not mine. But what little I do know about my biological parents is they were still in high school and abortion wasn’t an option. So here I am! Raised by amazing parents, family and they’ve never treated me any different other than their biological child.
Adoption does not fall under any kind of moral objection --- in fact it can be heroic generosity --- when the natural mother and father for some reason cannot parent their children. This sad situation happens when the child's natural parents are gone because of, e.g., death, disability or dereliction. There's nothing wrong with stepping into a sad situation where a child is without his natural parents, and trying to repair a broken situation by supplying an adoptive mother's and father's love and support.
BTW, my husband and I have an adoptive son as well.
The harm comes in when a child is deliberately "made" in such a way that he is deprived of his natural parents by plan. For instance: buying a baby in a baby-trafficking scheme. Or hiring a surrogate mother (reproductive concubine) with the intention that the maternal ties be broken. Or single women or lesbians being artificially inseminated with donor (or "vendor") semen and intending from the git-go that this child is going to be raised fatherless.
That is a whole heckuva lot different from the praiseworthy practice of normal adoption.
I'd almost call them opposites.
In normal adoption, good parents are stepping into a sad situation and trying to supply what the child needs. It is centered on meeting the child's needs.
With--- for instance --- Elton John and his "husband" hiring a rent-a-womb woman, it is making a child deliberately and intentionally deprived of durable maternal connection from the git-go. It is centered on meeting the adults' preferences.