Using unseasoned cooked chicken breast as your proxy for healthy food is...less absurd than using grapefruit would be, but not as much as you might think.

At least add like a quarter teaspoon of olive oil, an eighth of a cup of whole grain rice, and a side of like some sweet potatoes with its own seasoning or something.

Straight chicken breasts is like the meme level of what celebrities have to eat to maintain their figure, not what a reasonable human diet looks like. Chicken thighs with the skin on are reasonably healthy.