Tesla’s cruise control that steers sometimes is basically the opposite of those radar activated brakes some cars have.
Some cars will detect a potential collision and will apply the brakes, possibly before the driver (who is in full control of the vehicle) might react, averting the collision entirely or reducing the energy of the collision. It errs on the side of caution slightly more than the driver does, and will take control of the vehicle pretty much only to bring it to a stop.
Teslas intend to take full control of normal operation, expecting the driver to watch out for unsafe conditions that either the driving environment or the car itself create, and then take control in time to avert an accident. Drivers aren’t trained for this. This isn’t how the system is marketed. This shouldn’t be legal on our roads.