No, it is Gobekli Tepe that has artificial fill, IE, it was intentionally buried by humans for some reason yet unknown. There is no suggestion that anything was intentionally covered up at Gunung Padang (I don't think).
Modern humans (us) are at least 300k years old I believe as we currently understand it, much older if you consider Neanderthal, Denisovan, and what are likely a myriad of other species closely related to us that may actually have behaved and had capability very similar to our own. There is no evidence that the motivations have changed with respect to human nature, we innovate and we do all the things that we have today. The reason we don't know a lot about what humans were doing pre Sumer/Egypt is because the planet was fucked sideways at the Pleistocene/Holocene transition roughly 12,800 years before present. There was a major large land mammal extinction where half the species of mammals over 100lbs in body weight disappeared, animals that had existed literally for millions of years prior...the notion that whatever happened to cause this would not have catastrophically affected humans as well is ridiculous.
One thing to consider when pondering why civilization might have been inhibited...the holocene, our epoch of time, is the most benign, longest unbroken interglacial period on record in at least the last 250k years...so that might provide insight into why there is no evidence of a past civilization like our own. But, other "advanced" civilization may have evolved and gone by the wayside without leaving much of a trail, their advancements may have simply been on a different track than our own.