While overpopulation is a valid concern, the two issues should never be interconnected. A prospective adoptive parent who believes adopting a child, rather than procreating, is solving the problem of overpopulation, has objectified the child.
A child is not an object.
The issue of AI is important to me. So consider this. What are the ethical concerns associated with our use of automated intelligence ? What if that AI has been taught to feel emotion ? It is non-organic. Yet, it has feelings. It is an object. Do we have an ethical responsibility to it ?
When an adoptee is treated as an object to solve a problem, it is the same consideration. And adoptees are so often denied their basic human rights.
Adopting a child to satisfy a personal mission unrelated to the welfare of the child is simply the wrong reason to do so.
Actually, adoption needs to end. Guardianship that supports the welfare of the child without stealing their identity from them is a better choice – and not for reasons of solving overpopulation. Every child deserves consideration and respect for their innate humanity.