It's not all belief, and I'm not saying it's all belief. I'm saying the laws of physics that appear to us through our senses are actually laws of psychology. But they are still laws. I believe we have a better chance of understanding them and building technology to overcome them if we use both physics and psychology at once on the problem. But deception and self-delusion are not especially powerful psychological techniques, so I would not expect them to work very well in this situation.