Is it just me or is everyone over thinking this story? Genetically engineered or not, clearly, that wasn't the focus of the plot at any time.
I felt there was a call to review our morals and face our fears, and through all that, I was entertained also!
Yes, I think that was the purpose/focus of the story, as well, but I don't see the critiques as overthinking, for me it is how the author hard a point (morals, etc) and said - I know I'll throw in some dragons so I can call it fantasy.