I have asked a few dentist why we have wisdom teeth, and why we have to remove them when God designed us to have them? For those who have had them removed you will know that if they arent taken out they can cause serious damage to nerves and teeth due to not enough space in your mouth for them to grow in (or growing in crooked).
I asked a Catholic dentist and he told me that if he had to guess that the people living back then were a lot healthier. And eating whole fruits and stuff (without cutting them up like we usually do now) would cause the required natural growth in the mouth for wisdom teeth to grow in properly.
So how does this relate to the old folk? I would say that they lived longer because they were healthier for many reasons. Now I dont know if that means 969 years, but reaching 100 should be no problem.
I have thought about the 969 and other high ages and tried to find some kind of “logical explanation”. I thought about maybe that age is multiplied by a number like 10 or something so that would “really” make him 96.9 years old which sounds good. But then you read around and see that people are mentioned as living to “only” 120 or so, and if you divide their age by 10 it makes them “really” 12 years old, so that doesnt work. Same idea if you think about the way they measure a year, like 100 days per year instead of 365, but that comes back to the same problem.
Another problem is where did these guys live? Did they live around the main cities or were they off in the woods on their own? If they were in the main cities why are they not mentioned in other passages later in history? Also what was it like to outlive your great great great great great great…great grandchildren?
I have thought about it, but in the end I decided to go with what the Bible says. He really did live to 969 years.