I drive a 2017 Forester and in 5 years of driving it I never had to turn off any of its safety features including pre-collision braking.
It's not always safe to keep the huge distances apart at the speeds the system wants (other drivers will cut in). The system can also have a difficult time with motorcycles lane-splitting.
Anyway the way I see this is the switches are there for the driver to use at their discretion. I would hate for the industry to move towards full automation. I love the system as it works right now. Just my two cents.