If that's how the anatomy of speech works, analogous to rules of biology, then why is it that when I ask if there are two different shuruks e.t.c. as with ashkenazi pronunciation, you say No.
A "no" to that question, would mean that you think that while there are two different ones in ashkenazi, there are not for sephardi.
Also, as to being precise as to what you have said, I think the sentence "Giorges has explained that in ashkenazi hebrew pronunciation, kubutz, chirik and shuruk are adjusted sounded "short" in closed unaccented syllables and otherwise, "long". Is totally precise.. If it's not then can you state where it's not. I can only be precise about what you've said in the past.. I can't predict the future of what you will say. You have never before used the phrase "natively long".to describe any vowel, so this is the first time you've described kubutz as natively long, and you've made the fine point in the past that kubutz is classified not as long, but as short, because it normally occurs in closed unaccented syllables. I am merely using clear and consistent and unambiguous language, by saying kubutz pronounced short, and kubutz pronounced long. So that it's clear that i'm not talking about how it's written(e.g. some vowels like chirik can be written long or written short), or its "native value", or its classification. One slight lapse in my language is when I asked my question after having defined things, you might object to me writing "two different kubutzes" where I wrote a question, but I wasn't defining things there I was just making my question starkly clear after having defined things, such that it was clear what I was asking, I didn't say giorges said there are two kubutzes.
It may be that you meant to answer Yes to the question. ? (i.e. that the vowel is shortened in sephardi and modern hebrew just like sephardi and it's natural laws of language) If so, id put it to you that in a conversation with a sephardi he thought there's just one chirik, between an ih and an ee. Whereas I guess you'd do pronounce a chirik as short when in a closed unaccented syllable, and long otherwise..So that doesn't really jive with your natural hypothesis.. Though i'm not sure whether you meant to answer yes or no to that question, or what you meant by your yes or no.