More specifically, I'm against anything less than L4 autonomous self driving cars.
For example, if people are going to text and drive, would you rather they have an intelligent L2 system that reliably keeps you in the lane and not crashing into the car in front of you, or just do as they are doing now?
I think there is much value in considering these systems as a better safety feature rather than fully autonomous.
Beyond safety, I think L2 accidents (which are already happening) will be VERY bad for the perception of autonomous driving in general, and will make it VERY hard on a regulatory level to get L4+ autonomous cars out on the road when they're finally ready.
The thing that changed for me while driving with both systems engaged is that my role changed from driving and continuously making small adjustments to stay centered in the lane and keeping the right distance. With the systems engaged, I was mostly monitoring that they work accurately. I don't have to bother continuously with most things, I can spend more time watching all surroundings to watch for anomalies / things the systems can't handle.
The end result for me at least felt a lot safer, and more relaxed. The systems felt very, very reliable.