I think that another way of looking at this story is some 'god' miraculously tidying up the litter that humans have carelessly left at the bottom of the ocean for one reason or another. In this magic universe the mystery tidy-up persons should be thanked for doing such a thorough job, leaving not so much as a bolt behind.
It is all so much easier if the human remains part is conveniently ignored.
Our ability for self-deception is breath taking.
Most Egyptian mummies come from a culture that was staggeringly remote and ancient - to Cleopatra, to later Byzantine culture, and certainly to Egypt after the Arab conquest... which was 1400 years ago!
Bronze age remains from Europe are not treated differently, you know. Those are also in museums around the world.
There's an ongoing controversy around the Elgin Marbles, which were removed to London between 1801 and 1805, and many people believe they should be returned.
I think there's an increasing recognition that the historic behaviour of archaeologists removing artifacts for display wasn't necessarily acceptable, but addressing past wrongs is much harder than preventing new ones.
It has not increased to any degree near adequate. But remove antiquities foreign antiquities from European museums and see how barren the halls and storage become... So I guess 'sensitivity' isn't going to increase any more than present levels.
Also, to assuage your cultural guilt, Egyptians, who feel no linkage to ancient people, are now digging up artifacts to hock to various wealthy collectors in the Middle East and Europe.
No, that's grave robbing. When Westerners did that in the past, it was grave robbing. If they do it now, it's also grave robbing. I suspect a lot of Westerners agree.
I think it's generally well-understood that when your remains rest in the ocean, you become fish food. The vast expanse of water itself is your tomb, not some little square on the floor.
Argue over the vehicle wreckage, but don't misplace your sentimentality.
I am writing this right now in literally the exact spot where thousands died during the Battle of Brooklyn in the Revolutionary War.
We subsequently moved on, they built Brooklyn Heights and DUMBO and a rather notable bridge here. It happens.
Both the US and UK seem to protect sunken military vessels for this reason.
The first thought that came to my mind was that the scavengers are cleaning up a small part of the pollution in the oceans.
As to cleaning up the oceans, I'd love it if someone could do some back of the napkin type calculations on how much pollution is caused by these sunken warships as opposed to commercial shipping or industrial runoff. I would assume this is negligible in the grand scheme of things.