Overestimated? How come anybody that has any history with computers knows how difficult it is going to be but such a vast amount of people, including people wit

Overestimated? How come anybody that has any history with computers knows how difficult it is going to be but such a vast amount of people, including people with money are so bullish about them. After doing some projects in kuala lumpour and singapore I knew that self driving cars were going to be incredibly difficult. one minute, driving along with no problems, next minute a huge amount of rain got dumped out of the sky, next minute the rain had stopped but some roads were impassable, some merely flooded but still open, others were undrivable on the sides but ok if you drove down the center. How do you code for that?