Are you referring to Newton's Laws of motion? Is that what you're referencing in terms of me taking a physics course (which I've taken 4 at a college level)?
Well, they work great in macroscopic conditions but they are inappropriate for things that are incredibly small, move at extremely fast speeds or very strong forces of gravity. Like anything in science (as of now) there are always exceptions and anomalies that preclude any absolute. That may be the end goal for science; the absolute truth of the universe and all of its operations, but it hasn't happened as of yet and likely never will. Look at any science that has proclaimed something to be a definite, an absolute. Something always comes along to show that it's not absolute in all cases thanks to better analysis and tools.
I agree that we can draw a parrallel between understanding the mechanism of scarless healing and gravity, scientists have no idea where gravity comes from, it is the most mysterious of the four fundamental forces in physics, it is assumed that there are subatomic particles that are called 'gravitons' which are carriers of gravitational force, but this is only a theoretical assumption (one day in the far distant future maybe we will detect gravitons like we have detected Higgs bosons by using an accelerator that is zillions of times more powerful than LHC) and yet even though we know absolutely nothing about gravity we still have Newton's laws of motion, Einstein's theory of relativity, so we have no clue what causes gravity, but we know very well all the effects of gravity.