Reasonable
The dungeon was located in a particular mountain a few miles away from Natasha's camp. However, even before the group could walk for half an hour, the number of encounters increased exponentially. There were many groves in the area, so the Cursed Eyes just wandered around there when they didn't try to destroy the camp.
"Oh, right… I have to make another crossbow and use Seal on those monsters," Ryan thought.
Ryan will have to leave that for another, but perhaps he won't even have the chance to make a crossbow since at least one soldier kept their eyes on Ryan. The only moment where he will have an opportunity to make a crossbow was when he takes a dump or something.
Regardless, Ryan confirmed his theory that most survivors chose the melee classes or the magic classes. From that group of twenty-seven survivors, only Ryan and Natasha used crossbows. No one else used bows or other throwable weapons.