As far as I can tell, the equations and theory of special and general relativity can all still work if you have light travelling in a vacuum arriving instantaneously, and take the constant c to be the constant that describes the translation of distance into time. In this formulation, the Hubble telescope isn't looking at the state of the early universe. If you were to compare clocks at the star being observed and at the telescope, they would agree that the light is emitted and received in year 13billion or whatever the age of the universe may be. But in relation to each other, x billion of those years have been translated into distance. Could you explain exactly how this might be/must be wrong? I beg your indulgence if you think the answer is obvious.