Oldest shipwreck found off coast of Turkey
bbc.com
bbc.com
It's like the next step after the ship of Theseus.
1. If you replace 100% of the wood, is it the same ship?
2. If there is no wood at all left, is it a ship at all?
This isn't a shipwreck. It's the site of a shipwreck. It's where a wreck used to be.
If the anchors were gone too, I would agree with you—some piece of the original ship (not just the cargo) must remain to consider it a shipwreck.
My point is that there are other reasonable explanations for why that stuff was there and it seems odd to consider 0 of them or consider but not explain why they were invalidated by the experts.