Thinking of the latest in physics with all the quantum stuff and string theory that I don't understand, it's also a possibility that our universe that appears simple is in fact much more complex, but has some sort of pattern or whatever to the laws which allows us to observe something that appears simpler.
This is more or less my viewpoint. We only approximate 'true physics' with our equations, which could be much simplified versions of the real thing, however accurate enough to a certain degree to be useful for us. An example would be using 1 + x + x^2 / 2 + x^3 / 6 to approximate e^x. It ignores an infinity of terms of the Taylor series but still is a very close approximation as long as x is inside a certain range.
We've seen other examples of this in physics throughout the centuries. Newton's simple laws of motion & gravity, for example, work for the kinds of numbers of speeds, distances, and times that we see in our everyday human lives on Earth, although are just approximations to the more complex "relativistic" equations.
It could be that we are forever simplifying true reality.