I've always thought we should have a digestive system bypass in the esophagus. Give us the joy of tasting, chewing, and swallowing food, but then have it go into an external bag before it hits the stomach.
Unless you stop the hunger altogether I don't think you'll feel satisfied without the whole process.
From brain perspective, "reserve power" would be when it ends up relying on ketone bodies, which start to be produced in higher numbers when you have been in high glucagon, low insulin condition for a longer period of time. Long enough that the liver burned through its glycogen stores and the liver cells redirect oxaloacetate to gluconeogenesis (producing glucose from stuff in the blood) to the point where the cells become unable to finish its own metabolism of free fatty acids. It then turns the intermediate products it can't use itself into ketone bodies.
That part can be regulated with nutrition, glucagon and insulin, but having plenty of glucose won't replace sensations from the digestive system itself.
I actually do feel it, I still feel hungry if I eat lots of something that has little caloric value. So eating lots of vegetable and water doesn't fool my body into satisfaction.
My understanding is this is how drugs like Ozempic work. They make you feel fuller quicker and prevent "food noise" where you think about food and eating even when your stomach isn't empty
Your stomach stops working (the rythmic muscle contractions that turns food into mush).
But if someone suggests that we enjoy an ice cream sundae, but spit each bite into a bucket? Suddenly they're a reviled heretic!
... But if someone has a non-bulemic reason to simulate eating, by all means go ahead. Just don't make it a big trend as we waste enough food as is.
I don't understand it, but I can't dispute it.
You're conflating the joy of food with its mere taste.
A lot of the joy (which you might just attribute to the taste part) comes as the food is digested. Not just the joy of not feeling hunger anymore, but the various chemicals making their way to the bloodstream and releasing endorphins and such. Sugar, chocolate and co for example.
Even easier examples would be coffee and alcohol. Their taste is hardly the major satisfaction factor.