The enormous, diverse country excuse is a good thought-terminating cliche but doesn't really hold up when the population of such enormous, diverse country is well concentrated along the coasts, with very dense rich pockets.
Sweden, for example, is tiny in population compared to the US but geographically its size covers from north Florida to NYC, with barely 10m people it's able to have great public transportation, fiber coverage to 80-85+% of buildings, cellphone coverage to 98% of the population even in remote locations.
Being enormous like the US might leave a vast area of low density population centres but it doesn't excuse at all that the areas where the vast majority of people live are dense enough to have these services very well covered. That doesn't happen though so the issue isn't being an enormous, diverse country at all.
Sweden, for example, is tiny in population compared to the US but geographically its size covers from north Florida to NYC, with barely 10m people it's able to have great public transportation, fiber coverage to 80-85+% of buildings, cellphone coverage to 98% of the population even in remote locations.
Being enormous like the US might leave a vast area of low density population centres but it doesn't excuse at all that the areas where the vast majority of people live are dense enough to have these services very well covered. That doesn't happen though so the issue isn't being an enormous, diverse country at all.