yah just try to feed used paper into your printer. not practical!
What percentage of office paper people throw in a recycling bin are reusable this way? They get stapled, folded, and mutilated. They get damp, wrinkled, stained, written on with pens and markers. They get handled with sweaty oily hands, stuffed in books and briefcases, taped, and then end up wrinkled from being in the bin. I like to fold papers three time and stuff them in a shirt pocket. Would that be a crime?
Everyone would have to treat each piece like a valuable work of art and make sure to stack it neatly when its unprinting time comes.
All of this stuff sounds great “on paper” but its implementation is a different story. You’re still going to have to grind most of it up and make new paper out of ole.