Yes we will definitely need a surgeon or a doctor per say because as far as I think robots cannot diagnose a disease, in my view all the AI and robots are more of an assist to the doctors than they doing the surgery, because it's human life we are dealing with and a surgery comes with all kinds of unpredictable risks which can only be dealt by experience and quick thinking of a human, as an example aeroplanes have autopilot in them which makes the pilot's job of reaching long distance ease but at the time of landing they switch it of and it all comes down to the pilot's capabilities as it comes with a lot of adjustment to make and lot's of factors to think and adjust accordingly......so in my opinion it's the combination of both man and machine that will create wonders as it always have