Once we have the ability to create tasty foods with effectively no caloric value, it doesn't matter how much our bodies tell us to eat.
You can easily do an experiment on yourself to prove this would not be a win: Just start a free day without breakfast and perform some aerobic but exhausting activities for several hours, until significantly after your usual "lunch time". Then eat a meal consisting of lots of particulary low-energy dense food - like salad or vegetables.
You will experience then a situation where your stomach is really full - to the point where you really don't want to stuff more food into you, but at the same time you are still hungry, as in "craving for energy".
That feeling is quite unusual, I've tried it a few times. Normally there is no good reason to enter such a situation. But it's an interesting experience, because you can then really feel that "full stomach" and "being hungry" are not mutually exclusive.
And that is what it would feel like to eat fake, zero-energy food.