Not entirely sure if this fits here as it's more seeming to misunderstand an idea than the idea itself being bad.
From an article about someone doing head transplants on mice and working on moving to monkeys.
Still, head transplantation could open up life-changing possibilities for people with severe disabilities or who have experienced extreme trauma. For example, paralyzed or quadriplegic patients with all their mental faculties could regain all of their physical movement if their heads were transplanted onto healthy bodies. **And comatose patients who have been pronounced brain dead but whose bodies are unimpaired could wake up and walk again if they received a functioning new head.**
I don't think the author properly understands what transplanting a new head would mean.