Kabru is taking the opportunity to troll Laius.
GOD... I so want more of this story.
I know much of the charm of the story was their adventure in the dungeon and its complex and pretty realistic ecosystem... but there is SO MUCH that could be done with this world.
HELL... I think that with Kui-sensei's masterful writing, she could even use the overused shounen troupes and make an engaging story (in a few ways she did use some of them even here).
But I will take any, and I mean ANY, little snippet of the life of the gang after their great adventure.