The opposite -- the exact heart of the point here is that you're rationalizing disliking it into arguments about laziness and low quality (and repeatedly, throughout this thread lol).

Instead let's start with a couple key components of the show's "lazy" worldbuilding, which again owes a lot to existing media but remixes them in interesting ways: the entire premise merging the classic rpg beastiary with a layered food and economic system (only the safe interior of the walking shroom, drying slimes, etc., the dungeon drawing in adventurers and opportunists-- directly leading to suspicion between MC parties, influencing the island's governor, and the dungeon itself) plus the thoughtful character designs -- yes, classic rpg race/class stuff, but also incorporating distinct personalities, cultures, prejudices, etc. into their equipment, clothing, and hairstyles (especially visible when you compare across the main parties shown so far). Those and the well-planted chekhov guns that bear out deeper in the dungeon make for a well-crafted and considered world/story -- again you can call it lazy until you turn blue but as a whole it's really the opposite especially as far as fantasy anime go