You're ending summary about where we came from explained everything. From the Fermi paradox to free will to the hunger games to just about all religions found on this planet. Your summary tied it all together. After hearing about all this I'm extremely angry over being a race of outcasts here. The Higher Ups definitely have a reason to fear us now. Wiping out our memories was a way for them to remain safe up until we wake up and want to take back what they took from us. They're very lucky we're so technologically inferior at this time. We have become a very violent people while we have been here.
I want to stay angry. Forget harmony and living in unity with the rest of the galaxy. What they've done to us, they should get what they deserve when we figure out how to get back up there and take back what they took from us. If all of this is true, they're bound to have a bad day when we get back up and get back out there.
Thank you for the wake up call, Doc Brown.