I don't why it is delusional to think that maybe fetuses, zygotes, embryos, would not want to be killed and would want to be allowed to live. You might argue that there is no way to know what the fetus/zygote/embryo would want. But since can't ask them, I think it would proper to assume they would prefer to live. That is what happens when an unconscious patient is brought into a hospital and can't give the doctor their preferences or religious beliefs about medical aid. They assume the patient would prefer to live and try to save the patient's life.