The same principle seems to have been applied already to roads – and drivers, presumably licensed to drive – who are presumed to be incapable of competently driving past a blocked off lane that's being worked on without running over the cones (or the workers) without the assistance of a Pilot Car.

You have probably found yourself behind one of these already – after having waited for what seems like forever – for one to shepherd other cars through the "zone," pull off to allow the herd to pass, turn around to face the other way and then glacially shepherd opposing traffic back the other way at a near-crawl  before – finally – leading you and the other cars headed your way back the other way, again.

It has rendered what used to be a minor delay into an often-major one. Just the same as if no one were allowed to walk up a flight of stairs without assistance. You can imagine what the wait might be at the bathroom if the same principle were applied there.

It probably will be, eventually.