Cardio isn't king, eh?

It is king if you don't want to die from heart attack, stroke, diabetes. It is if you want to increase your health span.

But if you care more about being not so frail that you can't take care of yourself in old age (assuming you make it that long), then strength is king.

To my mind, lots of cardio with a little strength training is optimal. So cardio is king, strength is highest-ranking subject.