You could drive fine at 30fps on a regular monitor (SDR). More fps would help with aggressive/sporty driving of course.
You’d also lose depth perception entirely, which can’t be good for your driving.
What? This is preposterous.
Have you tried playing a shooter video game at 30 FPS? It's atrocious, you get rekt. There is a reason all gamers are getting 120 FPS and up.
30 FPS means 33 ms of latency. Driving on a highway, car moves over a meter before the camera even detects an obstacle. The display has it's own input lag, so does the operating system. Your total latency is going to be over 100ms, so the car will have travelled several meters. If a motorcyclist in front of you falls, you will feel the car crashing into his body before the image even appears on the screen.
Also, if you truly are only a few meters behind a motorcyclist when driving at highway speeds, by definition you are being unsafe. The rule I learned in driving school was roughly 1 car length per 10mph of space, so you should be ~90 feet (~30 meters) away.
Finally, the average reaction time for people driving in real life is something like 3/4 of a second. 750ms to transition from accelerating to braking. A self-driving car being able to make decisions in the 100ms time frame is FAR superior.
Eh, kind of...
https://youtu.be/HU6LfXNeQM4?t=1987
Check out this NOVA video on how limited your acute vision actually is. It is only by rapidly moving our eyes around that we have high quality vision. In the places you are not looking your brain is computing what it thinks is happening, not actually watching it.
Whether it's fine to be less safe in certain situations because it's safer overall is a different question.
The existence of peripheral vision disputes that pretty definitively, though.
Tangential: event cameras work more like our eyes but aren't ready for AVs yet.
Self-driving is still a robotics problem, and robots are probablistic operators with many component dependencies. If you have 3 99% reliable systems strung together running 24 hours a day, that's 43 minutes a day that it will be unreliable ((1 - .99^3)*1440). Multi-modality allows your systems to provide redundancy for one another and reduce the accumulating correlated errors.