Well, there's consistently and there's consistently.
In 2016 Waymo reported their safety drivers intervening once for every 5,100 miles driven [1] - which implies to me that 99% of journeys nobody touched the wheel or pedals.
The problem is 99% isn't enough, as there are tremendous numbers of cars out there, and a busy bit of freeway would get a disengagement per minute.
It might be missing a few logging roads, private driveways and carpark lanes - but it shows Google is entirely capable of mapping streets in detail all over the world.
Can you give an example? I'm not aware of anything in 2016 that would consistently pass this test.