I thought the Mediterranean diet didn't count for non-Mediterranean people? i.e. it was the culture of eating rather than the content of the diet that made it

I thought the Mediterranean diet didn't count for non-Mediterranean people? i.e. it was the culture of eating rather than the content of the diet that made it healthy. (Rather than "clean your plate", "second helpings", and "eat til you're full") Edit: here is a link for the French diet https://en.wikipedia.org/wiki/French_paradox https://en.wikipedia.org/wiki/French_paradox