The butterfly effect celebrates the effect at the expense of the butterfly.
The effect is undeniable, the probability of specific occurrences to random turbulent events following some predictable patterns, no single one of which is predictable at all, predictable chaos, if you will, perhaps similar to the path of a planet around the sun, always the same, always different. If you record the picture with time-lapse photography, then the result is a predictable, but not precise, swirl of more-or-less uniform motion. Enter the butterfly, like some unknown comet coming in from out of nowhere. The theory says that this guy’s random actions can start off a chain of events that can ripple throughout the universe, affecting those previously predictable motions and possibly tipping the probabilities in another direction. But of course that butterfly has a history of its own, also, subject to the same perturbations that affect our planet. Presumably the butterfly has a free will and the earth does not, but is that truly so? The butterfly is born, metamorphoses, lives, and dies with very few parameters allocated to its existence. Conversely, a planet or even an atom is subject to internal forces, just like the butterfly, which can scarcely be predicted without putting many meteorologists out of business. Humans are another story, truly the genie now out of the bottle. Perhaps physical chaos should consider itself most affected by the ‘human’ effect, not butterflies.