have you really never met a coach or competitor that uses a (relatively) higher carb approach? the only argument im trying to make here is that i have seen people with different philosophies get the same results. so i asked you to explain yours because im trying to learn, not to belittle your knowledge.
It's perfectly possible to keep carbs relatively high for most of the contest prep. The issue is, especially towards the end leading up to the show, is that your calories are so low, protein intake must remain high to retain muscle mass, and fats are an essential nutrient that carbs are the macro most cut down to achieve their calorie deficit. My buddy who won his pro card a little while back was eating ice cream, brownies, etc up until a few weeks from his show. He just cut his fat intake drastically to be able to keep his carbs higher
