To see it clear, just remove humans and see what is left. Space, time, mass, energy, momentum, gravity, and all natural laws as a result of math WILL STAY - neither Pithagor theorem thus nor Universe will change. Alex this hypothetical is philosophy not science.
Science is empirical.
To justify your hypotheses you must have empirical evidence to confirm your hypotheses. You are using philosophical reasoning which doesn't cut it as far as firmly establishing a scientific hypothesis. This is a cool superstition. So, Sun did not shine. That is the point.