…and I like a good debate 
Though an interesting story element. The exploitation of the brain and the resounding success of destroying it to permanently put a zombie down is a popular form of destruction for a reason. Everything else is kinda saying it is magic.
Something, in some form, must tell the body what to do after all. I dig alien blobs. But I don’t accept the magic elements. Even fiction should have an order to it. That is why the best stories are made with the best structures. Such stories last decades, while the magical stuff falls into being forgotten or not as popular.