Drink coffee to live longer

I don't get it. Everything about coffee is bad. Caffeine increases blood pressure, promotes arrhythmias, and usually involves adding sugar and cream, which are also bad. How can there possibly be a dose-related decrease in mortality? They suggest some putative mechanisms with some very big words...

...During 4,690,072 person-years of follow-up, 19,524 women and 12,432 men died...Compared to non-drinkers, coffee consumption one to five cups/d was associated with lower risk of mortality, ...the HRs of mortality were 0.94 (0.89 to 0.99) for ≤ 1 cup/d, 0.92 (0.87 to 0.97) for 1.1-3 cups/d, 0.85 (0.79 to 0.92) for 3.1-5 cups/d, and 0.88 (0.78 to 0.99) for > 5 cups/d (p for non-linearity = 0.32; p for trend < 0.001)...

Conclusions—Higher consumption of total coffee, caffeinated coffee, and decaffeinated coffee was associated with lower risk of total mortality.

Circulation 2015 Nov 16; Association of Coffee Consumption with Total and Cause-Specific Mortality in Three Large Prospective Cohorts. Ming Ding, Ambika Satija, Shilpa N Bhupathiraju, Yang Hu, Qi Sun, Jiali Han, Esther Lopez-Garcia, Walter Willett, Rob M van Dam, Frank B Hu PMID: 26572796