That happened because high spead of robot to understand information and acting based on it quickly, the human can be slower in dealing with that amount of information. I believe it have both positive and negative , the positive side is being cheaper in the long term for owners instead pay wages for all employees every month , in addition to accurately of robot to do some jobs like surgery in the medical field and industry field, in contrast the negative side it is represented in rises unemployment people as well as high cost for one robot in conclusion , we should understand the both sides and place every thing in order