I am not sure if you are asking a question or making a statement. But from my studies DNA is not the end all be all. Epigenetics clearly show us that environmental impact aka everything external from the person, can switch on or off sequences in DNA making a person ill or well. What Buddhism teaches us is regardless of our external environment we can turn inward and take our power back, we can change our DNA with our own awareness, our own breath, our own compassion. Of course this is only possible under the right conditions. A person with sever mental health issues like Psychosis is not able to do this. So that enlightenment is possible for human beings under the right internal and external conditions.