The automation rule of thumb is that the automated process has to be significantly better than manual or human-assisted automation by every metric. It does not have to be 100%, but it has to be way better than the alternative. An autonomous vehicle can make mistakes, but if there are far fewer of them and if they are of the same kind a human would have made (otherwise it’s “worse than a human driver” by at least one metric), then it’s acceptable.
The automation rule of thumb is that the automated process has to be significantly better than manual or human-assisted automation by every metric. It does not have to be 100%, but it has to be way better than the alternative. An autonomous vehicle can make mistakes, but if there are far fewer of them and if they are of the same kind a human would have made (otherwise it’s “worse than a human driver” by at least one metric), then it’s acceptable.