I accept disagreement; it’s the engine of ascension.
I disagree with the need to substantiate a theory through rigid examples. Predictability requires observation for confirmation and is thus meaningless to seek during a speculative period. I concede that there is not enough information for inference and thus rationalize your demand as a fool’s errand - I can say any story and ad lib metaphor/symbolism/analogues as substitutes (crane->alien) and it’d fit. It seems like, ultimately, a non-sequitur. Even appeasing your demand, I’ve mentioned its significance several times. Obviousness is only obviousness after the fact. I’ll continue my analyses while keeping in mind that the crane does have well-known legends in the eastern canon, the audience Ryukishi targets first, which I have stated numerous times.