The mathematical "reason" is that at low energies all potentials are linear or quadratic, or the inverse square of planetary motion.
But that doesn't explain why at a very wide variety of length scales, all human-sense-observable phenomena settled down to such energies.
I have found over the years that the most productive research outcomes occur when there is a balance between optimism that one's preferred techniques will work (or that one's conjectured assertions are true), and pessimism that a proposed technique will encounter insuperable obstacles, or that a hoped-for result is unlikely to be true. Too much pessimism and one becomes discouraged and quits; but too much optimism and one wastes time chasing arguments or results that will never pan out. 1/4
quantum scientist, trying to build a quantum computer, hoping for singularity and space travel in lifetime. want to stop surveillance dystopia, climate change.