N-Seven wrote...
Shepard has to make a decision here that doctors have to make from time to time.
Some people are not fans of some modern medical practices. Blood transfusions, surgery, drugs/chemo/rad therapy, transplants or artificial implants etc. For religious or personal reasons, some would rather risk the consequences, including death, instead of receiving these treatments.
Shepard is the doctor. Organic life in the galaxy is about to be extinguished. You obviously can't poll every living organism to determine how they feel about their DNA being altered. And you need to act now this very minute because hey....you're bleeding out. So he does his job, makes he tough decision and saves lives. The extentnand nature of that life and the quality of it is unknown, because we only see two 'synthesized' beings in the end with the boy and his father.
Its less about him having to make that tough decision, and more than he just accepts it, and mosies on over and does it, without even asking Starchild about it, he has fought for Free Will, and for the right to develop as we will, and in the end he goes(in synthesis,) "Ok, I'll pretend everything i was fighting for before didn't happen, and force it on everyone, and naw Starchild, don't worry about explaining why these are the only options I have, its cool."