[Valectar]

At high enough energies the laws of physics are actually different. Two of the four fundamental forces in physics, the electromagnetic force and the weak interaction, are actually a single force which only appears to be two separate forces at "low" energies/temperatures, with low being the pretty much all temperatures in the universe after the Big Bang.

It is completely reasonable to test whether phenomenon that hold at low energies still hold at high energies, and that may be the only way you're going to find more fundamental physical laws. Especially when we know quantum theory is incomplete, since it is currently incompatible with general relativity.