Re: Why not
The helicopter IS the flying car. The reason you won't be able to pop down to the shops in your 'flying car' is the same reason you can't do it in a helicopter. You'll blow the neighbour's dog through his basement window, clip the telcomms lines off your home, snag a high-tension cable by the highway and come crashing down right in front of a 40ton freightliner. If you're sober.
It'll get messy after a few pints.
The license, training. airport and flightplans all exist for a really good reason.
Oh... and screw automation. Once you've got a few hundred thousand fliers in the air around a big city you'll get to see the three dimensional version of gridlock with the added bonus of falling out of the damned sky. How would the central control (there would need to be a central control for a city or you'd have absolute flaming chaos) for that many aircraft actually work?