For me, just getting the stuff tested that they find in the spoils is interesting. Having the items studied to see what they actually are, and possibly dating them is progress to me. People have been digging there for about 200 years. Modern treasure hunting isn't perfect, or fool proof. It's a process of methodically excavating old and new sites, and that takes time since they are only able to dig during certain times of the year, and they are hampered by government laws regarding archaeological sites. They have found things, specifically remnants of past human existence in those areas...such things as human bone from two individuals who weren't native to the area, found at great depth.
I liked the show, too. I dropped satellite in 2016, so I haven't seen an episode since. My biggest issue with the show was 55 minutes worth of filler and commercials, with 5 minutes of actual cool stuff. They could boil the entire season down to one good show. I'd still watch it.