You don't pay me enough to hang about in old Daedric shrines, so this will be brief.
Turns out, the folks using it don't like the place, either, so any treasures that are there will be moving out quick. Get in, get the goods, get out. No time to waste.
The patrols keep in close contact. Get spotted by one, they all go on alert. Your time window just got shorter.
Still, there's lots of stuff in there. If you can't get to the goods, you can fill your pockets with secondary loot that'll help offset the costs.