So what they show us a photo of an ancient Egyptian sword. That could have came from any number of museums, or exhibits.
This isn't the Titanic we are talking about here. Anything that would still be around would be small, metal, and covered under tons of mud.
These guys act like they went down there, in the correct spot, with a shovel and just dug it up. Entirely is correct, unless preserved there would not be anything that was wood that would have survived all these centuries.