The KOT exists to remove ambiguity between the front and the back of the shop. Verbal orders get misheard during a rush; a printed or displayed ticket does not. It also creates a record: if a customer says their order was wrong, the ticket shows exactly what the kitchen was told.
Routing matters as much as printing. In a shop with a grill, a barista station and a bill printer, the espresso items should reach the barista and the food should reach the kitchen — sending everything to one printer means someone stands there sorting paper during the busiest hour.
For Qatar there is a detail most international systems get wrong: the language on the ticket. Kitchen staff frequently read Arabic more comfortably than English, while the owner wants reports in English. Outale prints bilingual KOTs and routes them by station — kitchen, barista or bill printer — so each side reads what suits them.