One could argue that an inkjet printer is thus a CNC extruder, then. Where does it end? We make up words to usefully cover categories and describe concepts, and sometimes those categories and concepts overlap. "CNC", "extruder"
So, there are machines that are both CNC extruders and 3D printers, but not all CNC extruders are 3D printers, and not all 3D printers are CNC extruders.
Also note that a CNC laser is not a CNC milling machine. In fact, the CNC milling machine owners get huffy if you call a CNC router a "CNC milling machine". Perhaps the phrase you were looking for is "CNC subtractive manufacturing device" ?