Sangom Sir,
Though I like your disclaimer in the first line, I still disagree with your analogies and the Occam's razor hypothesis.
We indians were the first mathematicians to not only have the idea of advanced concepts, but even the basic numerals and abstract concepts. Can you imagine negativenumbers abstractly? like -2. No. We wouldn't have had calculus and geometry without some abstract geniuses. With education/popularity, we have come to understand them easily as a debit of $2 or loss of 2 pens.
So, same way when such abstractions can be possible, then a broader/abstract intelligence with many boundaries can lead to more accurate understanding than the Occam razor's hypothesis of littler/cheap understanding (with least chances). That is how silly, is the kOzzhukatai analogy. By thinking lower with easier examples, our neurons gets lost eventually, and we stick to cheaper theories/values/ideas/living. May be why overtime, our fellows found Sankara advaita easier to comprehend, they didn't want to think further. So Occam Razor is an excuse, when only mathematical abstractions/equations lead to rocket/satellite launches.
I am not belittling the simpler analogies, they are easier to start with and invoke curiosity. But such examples cannot provide a broader picture. That Kozhukkatai churnam/stuffing, though we make in 50 numbers and taxing, they would eventually come to an end. Whereas, Just take this universe, it is of million possibilities, and cannot compare to that kOzhukattai making. We have had civilizations from ice age, and with so much technological abuses, we still have resources, and the earthly resources are recycles and replenished. Our own body is a toughest survivor of abuses, except extreme conditions. Just consider the amound of gold in India (summation of all possessions, black gold among political parties), imagine the vastness of the earth's resources. How about the vast space in the universe? It is mind boggling!
Antares is a red super-giant, that is 900 times bigger than sun, contains thousands of stars with mean age 11 million years at a distance of approximately 470 light years (Ym) (calculated by mathematical equations!). Much smaller than the atoms are sub-atomic particles - quarks measured in planks (10^-35m). We couldn't see both these - be it antares or x-rays, they were found through mental-abstractions/scatter-experiments rather than direct perception or weight/length calculations. Read metrics here:
https://en.wikipedia.org/wiki/Attometre.
We need to understand the magnitude of measure scales, than that smaller examples while comprehending the Highest Brahman. So, when upanishads talk of Brahman, they aren't about a cup of milk (which can be emptied over few sips) or eating a seed (which would be later perceived as excreta), but there is so much that we can't perceive in-between, let alone the external objects of higher/lower magnitudes. So, we should really analyze with real sincerity, than just short-cuts with our in-adequate perception/denials.
That verse means "Brahman, the only One being that existed in the beginning, and everything else belong to Him and cannot exist without Him". All is pervaded, be it quarks or antares, nothing is outside of Him or outside of His control/power. That was the opening verse in BrihadAranya Upanishad, and the upa. explains that , through many sequential steps/verses, how everything was created from Him and how we are completely woven in that web of creation. You and me are going nowhere, until we finally reach Him, through the right threshold of good karma and right knowledge of Him/Reality.