There are plenty of non-container items (broken vases) that you cannot loot and that work to fill atmosphere and be used to throw, place on vents etc. Please consider keeping the amount of "things" in the room the same, just have 80% less that are lootable.
Something else to consider is that D:OS 1/2 had some randomized loot (and a whole mechanic for that), but I haven't gotten the impression that randomized loot exists (yet) in BG3. I could be wrong, and another playthrough would probably confirm it, but if loot isn't random then that is even more reason to have less of these lootable containers.
Either way, I don't want to spend so much time checking every single one of them. It's a huge time sink, but one that I feel obligated to do. Playing Solasta this weekend was a breath of fresh air for containers (and many other things).
