You're snidely dismissing the obstacles as being restricted to _today_, projecting into an arbitrary future to the point of being science fiction, and then complaining about "smug hand-waving"?
I don't understand why every person who takes the counterposition against you, Bryan, is always just talking about some hypothetical future like they're some Vedic astrologer, lecturing you about how this "real" future they see totally renders your argument pointless.
I don't understand why every person who takes the counterposition against you, Bryan, is always just talking about some hypothetical future like they're some Vedic astrologer, lecturing you about how this "real" future they see totally renders your argument pointless.