I don't think it's quite as simple as blaming those who died for being stupid. Autopilot's capabilities are exaggerated by both Tesla and Musk to the point of

I don't think it's quite as simple as blaming those who died for being stupid. Autopilot's capabilities are exaggerated by both Tesla and Musk to the point of being fraudulent. This leads many drivers to put too much faith and confidence in it. In addition, the mechanism to detect that the driver is paying attention is overly simplistic and easily bypassed. They don't even use weight-detection on the driver seat, despite the fact that the seats have the capability. Similarly, some of the other manufacturers have driver-facing cameras that further help ensure the seat is occupied. These are not complex mechanisms, and it is odd that Tesla does not have them. You could make the argument that people will find a way to circumvent the mechanisms no matter what they are, but I don't think that absolves Tesla of the responsibility to at least try a bit harder.