Or he gets downvoted because he thinks healthy food has something to do with calorie counting or those nutritional information printed on the package.
Weight is by far one of the largest risk factors for a huge number of medical conditions and problems, so I'd be amazed to hear how calories/nutritional content of food isn't related to health!
I'm not really weighing in on one side or the other in terms of the overall argument, but unfortunately metabolisms are rather sneaky. Calories in < calories out = weight loss sounds nice, but unfortunately calories out is a moving target in that your metabolism will ratchet down and be more efficient and/or consume muscle if calories in is insufficient.