Remove those airship exclusive materials and what are airships good for then?

Airship Ventures need exclusive rewards, they take effort, gil and time to build and set up. And yes, i understand there is no aviable housing anymore for airships and all of that, but that is what give these materials value too, its a good incentive to keep the airship exploration in place as a nice bonus for those who have a house. And if, ever, airships are allowed in lower scale for non-house owners, then honestly, they will have to put even better rewards for the airships as parts level up and they travel further.

Ultimately, if there is a shortage of airship materials, first, your server sucks, second, you don't have gil to get them, and if you have problems making a minimal ammount of gil in this game as saying, to buy airship materials to progress in the relic weapon quest, then you have plenty of alternatives, that method was implemented for people who could afford it. You don't have gil? Work like everyone else and get some.