Probably only after depleting liver glycogen and muscle glycogen with some physical activity. The muscle glycogen is harder to shift as it seems exclusive for muscle activity, whereas the liver glycogen is for blood glucose homeostasis. The glycogen storage requires depletion before carbohydrate repletion. And the nutritional technicians will get in here and point out that protein and gluconeogenesis are another way to create adequate blood glucose for energy and muscle glycogen repletion.
The modern situation is that many in the population with persistently high blood glucose do not deplete the glycogen stores, so the blood glucose is stored as body fat.
So that “carb up” comment needs some context. In a forum where many people are metabolically dysfunctional with persistently high serum blood glucose, the context of a “carb up” is that it would make the problems worse.