It doesn't bother me that they are useless, it's the fact that there are so many of them stuffed into a "dungeon" that it seems overdone. Too much. Overkill.
How many items need to be stuffed into one cave? Those 2 mentioned items are just 2 out of a handful of things that seem to be overkilled in some areas.
Why does this even bother you? I don't see the problem.
Look around your home, room, or office. There is clutter everywhere.
And as for it taking away precious time away from further enhancing the dungeon: I gotta say BS. It doesn't take that long to add some clutter to a dungeon and without clutter they would feel very naked indeed. I think the dungeons are awesome as they are at present.