in my opinion the reason we are not being told the true story is that if we were to know how we used to live, what is possible and what our place in the world is we would not accept all the things being done to us right now. Tartarians built amazing edifices everywhere they went, it seemed to be so effortless to them that they could do it anywhere and continue to prosper. we can't really do that, setting up the infrastructure to actually start living like a human is such a massive task for us.
i believe what the tartarians were able to wield the power of consciousness to bring about change to the real world, they didn't even need to do any real work since everything they desired would manifest in their lives. their technology was built to wield this power as well and made them even stronger in that respect. but in the end tartarians were defeated by the evil who works by corrupting the power of consciousness, there was a time when saints ruled the world and angels would descend from the heavens to our temples in order to join the people in communion with god. it was a beautiful time and we have fallen so far from it.