Hmmm - of course it is possible to run the London Underground without drivers, but public opinion is against it.
Hmm - the Docklands Light railway has been operating for years with driverless trains - without a major accident. And thousands of people use it happily every day.
The reason you don't see them on the undergound is more to do with the costs of converting 50 year old equipment and union resistance.
When the family in their shell suits are willing to climb into a pilotless aeroplane, our careers will be terminated, but persuading them that it is safe and sensible?.....Nahhh!
If you make it cheap enough they
will climb in - happens in every other walk of life.