We can "see" how a metal bar red hot at one end can be created from the energy in a homogeneously warm metal bar by videotaping the hot bar cooling down and then running the video backwards. Trouble is, that doesn't happen in real life.
But we can also see the bar being heated, say by the sun, and then cooling down at night. If that's not hot enough for you, we could heat it with a lava flow form a volcano. Or from an undersea lava flow.
The universe is full of energy and temperature gradients of all magnitudes and slopes.
The problem I have with your attitude is that you actively seek to discourage research into this topic. If you are right, you need only sit back and gloat. The history of science suggests this is a losing position.