Mobilizing three airships is not a small matter. They consume a lot of resources or energy stones. After all, unlike the Vermillion Hawk aircraft that can be powered by a small but complicated Mana Formation to generate energy, the huge airships could only run by using energy stones.
Currently, their city doesn't have many sources of income so they know that Vincent wouldn't easily mobilize these airships if the Nidite City isn't in a dire situation, especially when they can travel to the Nidite City in just a couple of days using the road they have developed.
Since Vincent opted to use airships instead of the roads for their Mage Battalion, it must have been a very urgent matter so everyone couldn't help but be curious about the situation of the city.
Some of them were even worried for the friends they'd made there after staying there for a few months.
