Because a Super Technika has a rangefinder. In the old days they used just Technika for the bodies without a rangefinder.
Over time users just referred to all models as just a Technika through the V series. When that was replaced by the current series it became the Master Technika, Master Technika Classic, Master Technika 2000 and the Master Technika 3000 and the Super designation ended with the 23, 45 and 57 Super Technika 5 cameras.