In my opinion it would be too complicated to manage a situation where your characters are half dead, without spells, not being able to rest. Even in a remote place in the world you can light a bonfire or spread a blanket and rest. Certainly with due attention and guard duty.
Making it difficult to rest would be like making the game nearly impossible to play.
It wouldn’t be impossible to play. Plenty of games have a solution to this problem. Pathfinder Kingmaker for example makes resting in dungeons cost rations. So you need to bring enough rations to rest a few times...but rations are heavy so you can only carry so much.
If you run out, you have to leave the dungeon, rest, then come back.
I don’t see how this wouldn’t work in BG3. And since you can just teleport out of the dungeon, it makes it even easier.
