Who is advocating that? Not counting is not the same thing as unlimited. Early on, the goal is to get fat adapted (via being in a state of nutritional ketosis). For most, once you reach that state, you can trust satiety signals to guide you, and not count calories.
The only people I’ve heard on this forum that had issues with their satiety signals not working, we’re drinking a lot of artificially sweetened drinks and/or consuming a lot of artificial sweeteners.