Such buses will stop too often. If you don’t allow a human to tell the bus that it can continue (not a “run over people” button, but a “trust me, it’s safe to continue” button), it may never continue.

Advantage over a bus that drives more aggressively is that this doesn’t require the human operator to continuously pay attention.

The Mainichi daily said the bus automatically stopped but the operators pressed the start button as they did not think he would walk out on to the road. (fourth paragraph from the end).

Perhaps you missed that part?