Yes, and autopsy and anatomical study of cadavers was once considered immoral. Just because our lizard-brain has a "that's gross" reaction, it doesn't mean it's the right reaction. Millions and millions of people are alive because of what we learned studying dead bodies.

We are ok unplugging life support if someone is well and truly braindead because they aren't a sentient, thinking self-aware being at that point. How is this different? Show your work. :-)