because they are awful!
I got a car 2 months ago and i’m incredible frustrated by the automatic cruise control. it has two modes “ICC” and “ACC”. I have no idea about the difference but the thing keeps switching between them and alerting me with a red alert every time!
I stopped using it after two weeks
it switches between them because it decides i am not moving the steering wheel enough (on a straight line). If I shake the wheel a bit the ICC reengages after a couple of seconds.
I get it is a failsafe so people don’t treat it as autopilot, but the thing complains constantly with both my hands are holding the wheel. mostly on straight lines or long constant curves