Going through nine months of growing a life inside of you is a vastly different context than signing paperwork to form a bond under.

There is a different context for a child who is with their biological parents(s) than an adopted child and their parent(s) to develop under.

What’s the relevance of pointing out the different context, since we’ve already determined it doesn’t actually relate to how much the parent loves their kid or vice versa?

Parent-child bonding

Again, see above.

countless generations have developed inside of their mother and being divorced from that biological condition removes countless stimuli

Is there any reason to believe we could not replicate said stimuli and conditions if we needed to?