The title is kind of misleading, in fact the article's second last paragraph ends with: "Or alternatively, the kinds of things that matter and determine better

The title is kind of misleading, in fact the article's second last paragraph ends with: "Or alternatively, the kinds of things that matter and determine better health might simply be very different than the kinds of things that matter for better cognition among the elderly. Social engagement and connectedness may simply be the single most powerful factors for cognitive performance in old age." Point being: if you're wealthy enough you should care more about spending time with the people you love than how long it takes you to solve a Sudoku.