I think modes of transportation should be equal opportunity. I'd like to see the Grand Company that could function without supplies. Naturally the ones already announced need them or there wouldn't be much point in those caravan escorts.
I don't see crafter/gatherers complaining that they can't participate in the Ifrit battle. We know fighting is for fighters. Delivering stuff, though, is a crafter's domain and gatherers probably move more distance than anyone in this game. Think about what would happen if a battle class had to pick up a sewing needle for 25 levels just to ride the airship.
It's not right to exclude a minority because they're a minority.