I see that you are conflating the material, fleshly world with the spritual world. We are not flesh and blood but eternal beings. I was remarking on the design of the material world.
Which we co-inhabit presently...
As I noted, St. Paul does the same thing. To him, heaven was a physical place, even if beyond our reach. He argued for the possibility of radical change based on the condition of the material world as he saw it ... "all flesh is not the same flesh". People just don't have the same view of things in our age. Nor you nor anybody.
True, but whilst we are in the physical realm, the flesh and the spirit are locked together in the same body, and usually fight a lot.