That is exactly what I did. I want to read things from people who have thought more about a topic than I have, not less.

Yeah that article was really thin, and at a guess I'd say that the age of great-grandparents has probably been declining since at least around the 50s or 60s and we're certainly not at peak-great-grandparent. This article reads like a young Millennial thinking they're the first one in the world to not know their great grandparents.

I’ve also adopted that policy after getting really annoyed that 90% of the time when someone mentions historical life expectancy, they make that exact same mistake and completely ignore infantile mortality.