What are the alternatives? As soon as these tombs found you can either open them now or set up 24/7 security around. The latter will be difficult to justify economically.
Basic physical security should not be an unreasonable cost burden when there is so much national economic and social interest in preserving Egyptian history.
Maybe it lacks dignity in that it's not what the ancient Egyptians would've preferred for us to do with their remains - but I think it's fair to set some statute of limitations on that kind of thing.