Earlier quoted context omitted.
Don’t forget people also died much earlier for thousands of years. There is a great deal wrong with very high fat diets, the issue is there’s also a lot wrong with very high carb diets.
No they didn't. Death rates from now treatable diseases were higher in the past. But if you managed to escape those and not die in a tragic physical accident, you lived basically as long as anyone else.
Given a large enough population you would still see very very rare cases of extreme age but you are something like 1,000 times more likely to live to 115 today than you where back in 1,000 AD. Combined with a smaller population and it’s likely nobody live to 115 until quite recently.