You are operating under a number of assumptions, first and foremost the idea that that which is released publically ("the best there is") is where the technology really is at. The way I perceive it, quantum coherence and quantum computers will lead to free energy, and may already have under the dark budget of the secret space program.
Oh it's about UFO's i didn't knew that
But seriously, what i`m saying is not because there is some secret conspiracy that has alien or very advanced technology. I just simply stated that technology has a limit, and humans are not omnipotent and never will be. Too much holywood movies make people's imaginations take over their rational brain, and think that humanity is capable of everything if it puts it's mind to. This is false, humans are very limited, stupid creatures, with irrational beliefs, even the high IQ people.
There isn't and never will be free energy. The entropy of the universe is growing as it is expanding, it is very unlikely that these concepts are physically possible.