That’s just making excuses. A promise is a promise. 
Turbulence would be the least of your problems. Idiots at the controls would be the greatest danger. Lots of people can’t drive safely in two dimensions let alone three.
It wouldn’t matter if they were on autopilot. The technology we current fly with would not work in an urban environment.
“If” The biggest word in the English language. 
Flying drone taxi then, close enough.
Coming to a city near you in just 20-40 years.
https://www.engineersaustralia.org.au/News/passenger-carrying-drones-now-reality
Just a matter of government red tape now.
And the US seems open to drones, like I said, cloud of them over my Kroger right now.
Don’t forget economics. It takes an awful lot of energy to defy gravity.
Apparently not, that drone doesn’t pack that much and it’s flying. Depends on the weight you are moving. And much better batteries are right around the corner.
220 pounds at 60 mph for 23 minutes/miles is not very practical to replace current methods of ground transportation. It would take two of those machines for my wife to fly from SeaTac to our daughter’s place in Ballard, and then they would have to sit on the ground recharging for some time before flying back … where they would once again need to sit while being recharged. In the mean time, the Sika cab company Priuses will have made several round trips for pennies on the dollar compared to the drones …
Model T wasn’t a good car either.
https://www.graphene-info.com/graphene-batteries
Capacitors fix the charge time problem.
It served its purpose … and it was cheaper to care for than a horse.
Drone will be far cheaper than a helicopter. I am willing to pay a fairly large premium for the convenience of flying.
But they are not intend to replace helicopters with them, they are intending to replace cars.
Take a while to get the price that low, they will start out in competition with copters but undercutting them by a wide margin, creating broader. demand.
Brace yourself people, we will probably see more technological change over the next ten years than we saw in the last hundred. That’s how exponential works.
I’m not suggesting they may not have a practical use, but they are completely impractical as a replacement, or even a common substitute, for surface transport. And they won’t replace helicopters either.
When exponential runs up against economics and physics, it slows dramatically.
That’s what they want you to believe.
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