The original problem was the answer to this question by BikerNYC --- How did it come to be that the Law of Conservation of Mass/Energy exists, or, for that matter, any law of physics?. I answered that with a post to the Anthropic Coincidences(AC) and you brought up symmetry breaking and conservation laws. This induced me to present the CP violation which is another AC(--although physicists suspect that CP violation must somehow operate on a large scale since it undoubtedly helped bring about the present-day preponderance of matter over antimatter.--).
I don't think there's any coincidence involved with CP violation. If the amount of CP violation were any more or less than what it was, it isn't clear that it would have affected us greatly, as long as it wasn't too close to zero. The universe would have been different, but not necessarily so different that complexity could not have arisen. There's nothing magical about the observed degree of CP violation.
For the record, I don't believe in "fine tuning", at least not at the level of symmetry breaking. If you find that there are two "independent" quantities that cancel each other to an exact precision, that indicates to me that there is some as-yet undiscovered physical principle that forces them to be the same (i.e., they are not really independent). To many decimal places, your legs are exactly as long as they need to be to reach the ground; there's no magic behind that coincidence.