At best that says they could count to the rough age of their own eldest. At worst, it’s just the Texas sharpshooter fallacy — you don’t get brownie points for that when the same book also gave a size for Noah’s Ark roughly on par with Berlin Zoo’s rhino exhibit.
I don’t understand. Genesis is talking about the maximum age someone can live. And it turns put to be very close to reality. It’s not measuring two different things. You confuse me.
The Bible a as a whole is making a lot of claims, not just that one. You claim one example of being (close to) right (given a chalcolithic lifestyle and medicine) is “interesting” in isolation — but that ignores that it’s surrounded by nonsense.
It isn’t interesting or surprising that a collection of nonsense might be occasionally (and even then vaguely) correct.
Lottery players are occasionally correct about the numbers, even if they chose them by superstition. But even they don’t get to claim the jackpot when they choose and the drawn numbers are merely “close”. Yet being close is the first step in how superstitions get generated.
Likewise, the Bible: no more or less interesting than any other collection of Just So stories, fitting a narrative to an existing observation.