Oh that’s a very interesting point. It’s certainly a tough problem. I guess it would simply have to be able to make these decisions, just like humans do. However, i think it ultimately boils down to how advanced the computer vision is.
Humans process imagery in so much detail and develop an almost instant mental model of what is happening. Unfortunately, our conscious mind can sometimes be elsewhere and not taking notice to the models produced by the sub conscious. Leading to poor reactions or no reaction at all.
Current computer vision algorithms are obviously no match for human vision (yet), in terms of how detailed the model of the current situation is. So, coming to a decision of what is “safer” would probably be less accurate, given the limited amount of data contained in the model. However, with computers the constant monitoring of this model is gaurenteed and so a reaction in a reasonable time is also gaurenteed. The same cannot be said of humans.