Eugene Wigner asked the question about the unreasonable effectiveness of mathematics in physics. Both, in my opinion, are the expression of what the greeks would have called ananke or neccessity. In Plato's Timeus, where he described his cosmology, he described the origin of the world as a blending of nous (intellect) and ananke (neccessity). In more modern philosophical language it is as I've already said translated as neccessity, but also logical neccessity and physical laws.
Since tautologies are those truths that are neccessarily true we see that physics and mathematics attempts to reduce their field of study to tautologies but with an irreducible minimum that distinguishes from tautologies per se. After all, mathematics and physics is not logic, they refer to the world and in the world, there is always a degree of freedom.