We are being limited in awareness by controlling factions. Throughout history, the most impactful, population shape shifting events were staged by the top 1% to force humans to believe in supporting their greed. We are being led to believe aliens are a threat to humans, to once again, make us unite aka "fight for the cause". Aliens are so advanced, we can not even grasp the concept of their technology.
They're 500 Million+ years ahead of us. If they had harmful intentions, we would have been dust in the galaxy by this point. Yet the top continues to spread misinformation to keep people scared and away, hoarding information, which if learned by the general public, can cause them to lose their control over the human population.