With Airships you can buy the components of the MB if your FC all contributes funds to it. You don't have to build each component to have airships.
Seriously though, for the sake of balance, crafters don't make much in the way of endgame worthy gear. Crafting though takes a lot of work and while people enjoy it, they still want to feel rewarded for their efforts. Removing the perks of that effort is likely to make them unhappy.
Crafting shouldn't be mandatory for everyone, but likewise, it should be rewarding enough to match the effort it takes. Particularly now with all the gating/red scrip stuff.