This isn't an exception. Eat less.

This is definitely an exception, one would be deficient in just about every (micro)nutrient and therefore expire much faster than a normal human. While also being much more miserable.

Oh, I guess we're taking this candy diet suggestion far more seriously than I originally thought.

It wouldn't require a whole lot of thought to come up with an all candy diet that supplied the minimum necessary nutrition. How broad is our definition of "candy" for this? Are you willing to consider candied fruits, vegetables, and bacon? Chocolate covered things? How much dark chocolate would we have to add to something to consider it candy?

Nobody should be taking my candy diet seriously

Well put, now you have me wanting to try this candy diet.

Mostly agree but if your diet is particularly bad, just eating less will mean existing nutrient deficiencies are magnified and (probably for this reason) you'll feel more hungry than you need to, increasing the chances you give up. IMO.