the idea that when you kill the life form but also get to dictate its decomposition process is one hell of a power trip. i don't have much sympathy on this one, especially considering that i already don't endow non-conscious beings with inherent rights or considerations
This logic is flawed. Next time you're in an alcohol induced "unconscious" coma I'm going to have you killed and dismembered and then stored in a garage. Unconscious does not mean no rights.
Apparently there are laws about handling dead people, like burial or cremation. I don't see this as a power trip, just common decency to keep rotting corpses off the streets.