Your criticism of this channel may be on point - I haven't watched it. But please don't make the mistake of equivocating scientific hypotheses, theories well supported by evidence and crank pseudoscience created for a mass audience. Hancock hasn't been excluded from the 'mainstream' archeological debate. He never participated in it in the first place. He's a writer of retrofuturological science fantasy in the same vein (and citing much the same evidence) as his predecessor Erich von Däniken. This stuff can be hugely entertaining (I'm a science fiction fan and grew up on 'face on mars', 'chariots of the Gods etc'). But its epistemic are based on just so stories and shifting goal posts, not triangulating the dating of sites, engaging in archeological digs or weighing in on scientific arguments about methodology.