Didn't Germany try that little trick, back in the 1930s and 1940s? Seems to me that it wasn't a very good idea then either.
Yes, the CCP’s genetic manipulation experiments are very reminiscent of the Nazi “Doctors”; EXCEPT, the lentiviral-vector technology is very real.
And yes, this technology could potentially change eye color, skin color, hair color etc. (in adults!) along with countless other genetically defined traits.