American's live more intensely. Also, they live more freely.

I really like the work Our World in Data does but sometimes it illustrates how important methodology is to get at useful answers.  

From Why is life expectancy in the US lower than in other rich countries? by Max Roser.  The subheading is Americans have a lower life expectancy than people in other rich countries despite paying much more for healthcare. We explore the number of factors which might explain this difference.

It is an interesting and worthwhile question.  Roser identifies seven areas where the US is indulging harder than most OECD countries: Smoking, Obesity, Murder, Suicides, Drug Overdoses, and Car crashes.  He also includes Infant Mortality which I exclude.  It is well established that there is a sharp definitional issue whereby the US includes many more children as viable births than do other countries.  He also includes Access to healthcare but that is kind of a bogus measure - ill-defined and the most recent global data comparison being from more than a decade ago.  

The net is that Americans party too hard, eat too much, fight more violently, get more depressed, party too hard, and drive too fast.  One might say they live more intensely and die younger.

And that is true as far as it goes but it is kind of a tired old European criticism of the US.  

I think the reality is much more interesting and a master class is Simpson's paradox.  The US, among the freest in the world where people indulge in a much wider variety of personal and cultural behaviors than anywhere else, is the most racially, ethnically, and culturally varied in the world.  Government simply is not allowed to constrain behaviors in a fashion common elsewhere.  

Accepting this, the question becomes, given the cultural make-up of the US, how do the socio-econometric measures of America compare to those in the origin countries of those cultures.  Our data sets are extremely patchy at the level of discreet cultures, though sometimes comparisons can be made.  The best we can usually do is aggregate up from ethnic to race to continent of origin.  

How do Americans of European origin do in comparison to Europeans?  How do Americans of Asian origin do in comparison to Asia? etc.  It is a crude measurement strategy but it captures some important information which is otherwise overlooked.  

I have not done a comprehensive study but whenever I look at socio-econometric measures, I always find that Americans always do materially better, usually 10-50% better than their continent of origin counterparts on whatever socio-econometric measure.  

The American system of freedom, checks and balances, rule of law, equality before the law, free markets, property, etc. produces better results for everyone than all the origin countries with markedly less free and more Statist orientations.  

So why is life expectancy lower in the US than in other rich countries?  Maybe it is because we live more intensely.  That is likely to be an element.

I think much more likely, we have a different life expectancy because we have a dramatically different mix of cultures with all that that implies in terms of diets, risk-taking, conscientiousness, work ethic, etc.  All of our citizens with their different cultural profiles do better than their peers in their culture of origin but because there is variance in socio-econometric outcomes between each cultural group, the overall means will be lower than more homogenous countries.