You can't go too far off the deep end and never place blame, but I think it's safe to say that the air travel system has considerable incentives for acting in f

You can't go too far off the deep end and never place blame, but I think it's safe to say that the air travel system has considerable incentives for acting in favor of the system's improvement vs. in favor of individual blame/responsibility, and that's made it what it is today. "Human factors" is another way of saying "this is something in the system that's error-prone that we haven't controlled yet, but maybe we should if the statistics say so."