The earth is four billion years old. To believe that the only civilization that ever existed is just the recent ones back to even the ten thousand years they are pointing to with Gobkli Tepe is naive and arrogant at the same time.

They point to a lack of historical information, and seem to imply the knowledge is being kept from us. That might be true to some extent, but thinking there was only one prior civilization through four billion years is likely against the odds.

Mankind could have survived in very small numbers through many world wide or near world wide natural disasters, and each time something befell the earth we were back to sticks and stones only to rise again. The history is lost because of the small numbers of survivors and their need to spend every waking hour scratching out a survival. The book by Spencer Wells Journey of Man is a good source to understand how humanity was bottle-necked by earth events. He points to the last near extinction event as an ice age.

There is evidence for such events as ice ages, volcanic activity, meteor impacts happening dozens of times down through those billions of years. The events and plate movement of the earth would have destroy almost all evidence of the existence of civilizations more than a few million years past.

At one time there may have even been been evidence of that elusive missing link but that evidence is long gone, because the time frame we have to examine is relatively short compared to the of the existence of earth, and the events we are a looking for are much further in the distant past than our paradigm will even allow us to accept as a possibility.