I think of a calorie tracker as a compass as I navigate an overly calorie-dense world that doesn't make us exert ourselves to the point of caloric deficits any longer.

For the aware user, combined with a scale, it helps normalize estimations of calories which can be incredibly deceptive. For example, try getting a group of people to estimate how many calories are in a store-bought muffin or donut, a bowl of nuts, a sweetened coffee drink from a drive-thru, or their typical bowl of a favorite cereal. I'm used to the casual observer's guess being about 1/3 of the true total if you weigh the item and read the label.

So in your scenario, the calorie counter would be a signal that you need to cut portions or cal density if your weight is going in the wrong direction, not unlike how a compass is just a tool if you're lost - you still need to know how to use it.