Ethical questions arise concerning the Johnson and Johnson Covid 19 vaccine that was made reportedly using stem cell lines from aborted humans. Is it morally acceptable to make vaccines, ultra-soft kid gloves, lampshades, or cosmetics with aborted human body part ingredients, or should human decency respect the dead including those aborted proto-humans.
Nazi scientists were of course not recalcitrant about exploiting anything to advance their purpose. maybe they believed they could socially engineer a better human being. One of those Hobbs and Shaw movies had such a premise in it.
Another concern is the phenomenal possibility of evil in first aborting humans and then using them to engineer vaccines that are from a corrupted source. If Satan exists he might be amused at debasing all of mankind with such self-degradation.
When people take shortcuts to goals that aren’t necessary they admit the possibility of deleterious unintended consequences and that should be avoided if one is being cautious at all.