The important part here is to use the right benchmark for human drivers. Crash statistics are heavily skewed by drivers that are speeding or under the influence

The important part here is to use the right benchmark for human drivers. Crash statistics are heavily skewed by drivers that are speeding or under the influence. That can be the right benchmark to show how AI driving can help in certain circumstances, but they don't show why most human drivers should be replaced. Taking those out and considering assistance systems in new cars (which already work quite well), AI has to perform incredibly well to drive safer, especially if it can only drive in easy weather conditions.