More specifically, it's equating what their features as dragons would look like as humans.
So like, Kanna for example is young but has chubby thighs, Ilulu has stunted vertical growth but her flame sacs are huge, etc.
Not really? The guy is saying that without the main source of commerce, people aren't going to come and whatever the primary source was before the dungeon appeared, all the people responsible for it are gone.
Like, it's been thirty years-- all that remains of the original inhabitants are...
I kind of like how you can see this artist and instantly come to teh conclusion that this is the kind of isekai so bad, it isn't scraping the bottom of the barrel, but it rotted through and is seeping into the shit-stained floor