Also you can't drink gasoline, which has a ton of calories, straight up, so CICO is bullshit.
But to steel man your argument: yes, macronutrient composition obviously matters, but you can lose weight with a low calorie diet of any composition and you cannot lose weight with a high calorie, macronutriently balanced diet.
CICO is demonstrably bullshit. Vodka and Coca-Cola have the same number of calories, but vastly different effects on a person's metabolism. Just compare a vodka binge drinker with a coke binge drinker.