You make a good point. I have watched several Hancock shows, including the one on Netflix, and while some of his points seem plausible, he tries to link everything into a common source that does not seem plausible to me.
There are some things that are plausible that I think would be interesting to see actual academics researchers spend time on, such as the Sphinx and a few other claims.
- The Sphinx:
To me it seems plausible that the Sphinx may have been constructed before the Egyption civilization, based on geological analysis that indicates a wetter climate and that the head seems to be carved much later than the rest (even proportions are wrong).
The findings in Göbleki Tepe proves that you don't need a massive agricultural civilization to create impressive stone works. People can get together and make amazing things without having to invent an Atlantian civilization that travels the world.
Unfortunately I think that Hancocks involvement may prevent serious research into this, as they don't want to be associated with him.