For the same reason that "Toner Out Override" isn't the default setting on my HP CP2025DN color printer. Samsung wants you to burn more color toner so that (Doh!) you'll buy more Samsung toner.

Setting the Toner Out Override on my HP has cut my toner costs by about 30% by letting me use toner cartridges until they are actually empty, rather than replacing them when HP says they are empty. If the Override isn't turned on, the printer flat stops working until I put in a new toner cartridge even though the old cartridge has many pages of printing left in it.

tanstaafl.