I think there fine personally thou Lore-wise I believe not "Every" NPC can even use Aethernet travel other wise we wouldn't have ppl getting jumped by mobs walking from Ul'dah to Horizon (or any other place) plus I think large bulk crates can't be taken by "Non-PC" ppl threw the Aethernet anyway, so theirs also that, got love the "Hammer Space" trope its so useful when magic's involved (so the in-city Aethernet is there cause about 80% of Eorzea can use it but only for "personal" light travel & not as regularly as we the plot-armoured PC can/do (maybe 1-2 times a week for about 50% of the population that can & only cause they trained/know how)