When the priestess heard that the lord wished to have a feast, she wasn't satisfied with just the boar on the menu. Remembering the description of the dungeon she asked for permission to venture into the dungeon to find other items as well.
In her opinion, when there is a jungle nearby, there won't be any limitation for the food items as well. After all, she had lived her whole life in the jungle and knew how things work there.
Dhruv didn't have any problem with this suggestion, so he ordered that they could do that.
He didn't send them alone and arranged for Thala and his bodyguards to accompany the tribe's members into the dungeon to ensure no mishaps were to happen.
Although the goblins didn't wander that much in the jungle, it was better to be prepared than sorry.