I agree, Rory, but your afterlife won't just include the chemical components of your body. It will also include the impact that you have had in this life on other people, animals, and things, including the effects of this essay that you wrote.
You might be interested in my essay "We aren't just Naked Apes or Naked Souls" https://medium.com/no-echo/we-arent-just-naked-apes-or-naked-souls-d14baf0714e5