The ILS provides “guidance” to the crew, but the crew manages the flight path to landing. Larger aircraft, such as Boeing 777/787, Airbus A380/340, etc. are optionally equipped with “Cat-3b Auto-Land Systems,” which can indeed be coupled to the Autopilot and fly the aircraft along the descent to touchdown, but they’re a very expensive option for airlines to purchase and maintain. The system you hear calling out the altitude alerts is called the Enhanced Ground Warning System (EGPWS) which provides a multitude of advisory information to the crew, including wind-shear warnings.