Again, thank you for your reply.
if you are in a such remote area that you can't even run a mobile LN node
It is not a thought experiment about a node being in a remote area. To the contrary. It is a thought experiment about where exactly the "edge" of the network even is, whether we can safely push lightning and lightning payments out to the edge.
But I suppose I did not spell it out that way and can understand how you interpreted it.