The reason is they do not want to discuss reality, they want to keep mankind afraid and under control.
"Contact (1997)" is one of the closest movies to actual alien contact. Aliens are not really that alien.
Now, lets talk about anti-gravity. It doesn't exist.
Because, gravity, doesn't exist. The gravity we feel is a electro-magnetic force.
A scientists wondered what would happen if you charged a capacitor to a million volts. So, he went about embedding two copper plates in a block of acrylic. Being sure to remove all air bubbles. Then he charged it up. And what happened? It floated.
Now, the secret space program is using triangular craft with capacitors as their propulsion. You can watch them if you get certain pairs of night vision scopes.
So, hollywood doesn't show this, because they do not do anything to actually show the truth. Any truth they do show is hidden, often in plain sight.
This sounds accurate to me. The electric version of reality; I always felt like the electricity was intentionally made to be dangerous amounts of voltage or whatever it is, so that people would be afraid to mess with it. All power is kept up on poles so that we won't meddle with it, is what it seems like, and I'll bet if we were able to study electricity for even just a little while, we'd have inventors in garages coming up with all kinds of things that are hidden for now.
It would be great to have all kinds of inventors in garages following in the footsteps of Tesla,
however, they would have to unlearn everything they learned in science class.
They would have to embrace
And they would have to unlearn such untruths as
I think that is why I drew cartoons in school instead of learning any physics or any such unicorns. I can see how obstinate people can be when I ask simple questions about their 'Big Bang'! My ignorance lets me imagine what you mean by tiny bloops, occupying every fraction of space instead. I like Nassim Haramein's explanations of the expanding/collapsing universe too-- both inward and outward at once in a feedback loop.