A recent column in the WSJ made your point. The column was encouraging retired people to spend more. One reason was that very few of us would live into our 90's much less reach 100.
I don't think it makes the point for taking SS early though.
I'm going to spend money the same whether I take SS at 62, 70, or somewhere in between.
If I die at my break even age, it's totally a wash, by definition. I've broken even. If I die earlier, I gamed the system better by taking SS early, and left more to my heirs, but really, whether I took SS at 62 or 70, I had enough to live on as planned, which is what's most important to me.
But if I died past my break even age, I'll probably* have more money by deferring taking SS at 70. Note that I didn't work any longer, or spend any less, but rather I simply waited until 70 to take SS, and now I've covered that small chance of living into my 90s or 100s better.
*I say probably, because reductions to SS benefits could be coming, and if they are unfair to those who have deferred, it clearly throws off the balance (in favor of those who grabbed it right away). Also, I might have made more by leaving more money to invest when I took SS early, especially if I time it to start taking SS after a downturn, with more to invest in the bounce back.
Real life story, my dad retired at 62, and I'm pretty certain he started SS right away. He'll be 83 this month, and is looking at his IRA balance and starting to think about how many more years they can stay in the nice community they live in before it runs out. They can't live there on SS alone. Had he waited on SS, he's now at about the break even point (or at least getting close to it) so the IRA balance would be about the same, but those larger SS checks would cover a greater % of their expenses, and his outlook for not outliving his money would be brighter.