I’m on the hedonistic treadmill enjoying the run

I think you’re confusing average with median. If 90% of people make it to 70, but 10% die before reaching 5 years, you’d have average life expectancy at birth of about 60, but 90% of the people will live longer. That’s why prehistoric life expectancy values are misleading. It wasn’t that uncommon to reach an older age, just a lot more humans didn’t survive the first few years

Sounds like the 4th week is also part of the routine