Exactly. There's a famous video out there from a few years back showing Tesla autopilot dutifully following a BMW at highway speeds. Then the BMW suddenly swerves around a stopped vehicle in front of it at the last minute, and the AP doesn't have time to recognize the object and come to a full stop, so it runs right into it. (The object is a fake baloon car, but the situation was real enough.)

Tesla has since improved recognition to prevent that situation, but the point remains: blindly following other vehicles is a common mistake. Remember all the "Do Not Follow" signs on construction vehicles?