Perhaps read again what I wrote. I explicitly stated that those who still work at 70 rarely do this by choice. More concretely, the lady behind the counter at Walmart is 75, and she definitely does not do that job because she loves it so much.
This was to contrast with the comfortable situation that we in tech are in. We can choose to retire early, even if it comes with lifestyle impacts. Not everybody desires a penthouse in downtown. And not living there does not mean you are living on the street.