Ah, the link you've added AFTER my comment. Because nothing screams more fairness in a debate than going back and modifying your argument.

Also, the very article you quote does the polar opposite of what you claim. It does not discredit but actually support my "armchair archaeologist" theory (which wasn't even a theory, just an example of how things COULD be misappropriated due to archaeological evidence generally being scarce):

Their results have established that Monte Sierpe wasn’t actually the handiwork of the Inca, but of an entirely different kingdom that controlled the area before they arrived. The researchers believe the rulers of this kingdom designed the Band of Holes to serve a purpose that was vital to their success and that the Inca later expropriated it for use as a tribute depot.

Arguably I've only gotten haflway through the article as it's 2:30am here, but that very statement seems to suggest that said "discrediting" didn't really happen.