I wonder how much of this is correlation vs causation. For instance, if you can afford a couple cups of coffee a day (time and money) perhaps you're just more well off in general. Coffee might be a bad example in this case because it's pretty low cost (wines a better example), but my point remains.
Previous coffee research with positive outcomes for coffee drinkers didn’t factor in that people with underlying medical conditions or that take medication that make them more likely to get vascular problems don’t drink coffee.
I wonder about causation from a different angle. I only drink decaf and don’t do any caffeine specifically because I know I’m at a higher risk for heart disease and caffeine has triggered cardiac episodes for me before.
Coffee isn't expensive or time consuming. I pay about $7 for 12oz of ground coffee, and it lasts for at least a couple weeks' worth of brewing an 8-cup pot of fresh coffee every morning.
I suppose if you pay someone else to make your coffee it would cost more, but that would be a massive waste of money to do on a regular basis.
i take caffeine pills, i need the caffeine, but if i had to sit down and drink a whole cup of liquid, i find that i just don't, i'm sure i could find the time for it but i don't
My comment was less on the specifics (cost/time) and more on causation vs correlation. See Sop's comment for a much better potential cause. I agree, the cost/time is a weak argument.