Self-driving cars that "only" work on non-rainy days = self-driving cars available 90%+ of the time in sunbelt states. I have no idea why people minimize level

Self-driving cars that "only" work on non-rainy days = self-driving cars available 90%+ of the time in sunbelt states. I have no idea why people minimize level 4 self driving. It would absolutely be enough for most people in those geofenced areas/cities to no longer need a car, would massively drive down drunk-driving deaths, and would be a huge benefit for the blind, the elderly, the rural poor, children, etc.