Human drivers drive into other people all the time, whether due to intoxication, tiredness, or just outright not paying attention. I know two people that have gotten rear-ended at a stoplight by another driver going >40mph. One of them was drunk. The other claimed to not be paying attention and otherwise seemed sober.

Likewise, plenty of people just stop paying attention and read their phones ... idling at intersections much much longer than necessary. Or drive stoned and drive around at ridiculously slow speeds.