This basically comes down to how fast your body can process blood sugars (metabolism), and how well adapted your body is to the foods you eat (ancestry).
For a lot of us with diabetes, and weight related issues, we simply have bodies that aren't really good at processing blood sugars as we have a low metabolism and we come from a lineage that has been traditionally non-carbohydrate eaters.
Whereas some peoples have been eating rice and other carbohydrates for millenia and are well adapted.
If you come from a lineage where your ancestors have been eating large amounts of carbohydrate based foods, it's very likely that you're well adapted and have a high metabolic rate to be able to process them quickly without them harming your body.
It's also likely that your culture has at some point discovered the benefits of intermittent fasting to be able to reset and heal the body.
Many of today's issues are from people who aren't used to eating carbs, eating them all the time and never fasting.
Eating carbs 24/7/365 is good for business, but bad for your bodies. If people would just learn to only eat for at most 8 hours during the day and fast the other 16, many of today's health problems would be solved.
Anyhow, thanks for commenting on my post, I enjoyed reading your introduction post! :)