for coffee it's probably very similar
we say "the dose makes the poison" but it doesn't change that regularly drinking a low dose of poison is not good.
I'm not sure that's the right conclusion there. Vitamin A is a poison, because it's toxic in high doses. But that doesn't mean you should avoid vitamin A.
The expression means that a poison cannot be defined independently of its dose. You need to know the chemical and the amount.
It also correlates with serial killers, because turns out no one likes to do their hobby in poor weather.
As an example for coffee consumption it could just be that coffee is consumed more in countries with higher living standards and higher living standards lead to longer life. Coffee might not necessarily be healthy by itself, though of course it could very well be.
People who don't have access to Healthcare don't have the luxury of things like coffee, I bet that shows in the data.
I'm reasonably sure that regular drinking of water at non-toxic doses is good though.
So it really does depend.
Lots of people have drunk themselves to death.
I've never heard of anyone who was otherwise healthy coffee-ing themselves to death through regular consumption.
(There are rare conditions that make caffeine fatal, but I'm talking about the general population.)