The article was naive at best. Reality bites everyone eventually.
I'm 50 and all I think about is my retirement. That doesn't mean I don't have fun. The things I do for fun now I never even considered when I was 20 something.
For instance I participate in lawn bowling. Believe me it's fun and I get to meet a lot of single ladies around my age. Some of them are very fit as well.
And it doesn't cost a lot of money.
https://en.wikipedia.org/wiki/Bowls
Also Charity work has become important to me and again something I never considered in my youth.
NOTHING IS MORE IMPORTANT THAN YOUR HEALTH. And there's no mention of that in the article.