There is no doubt that Waymo sensors can work outside of geofenced areas.
Undoubtedly, Waymo can work outside of areas where Waymo staff have not done the homework.
Just because it can, that does not Waymo allows it to do it without homework.
But what separates Waymo from others is Preparation.
Yes, its can can run without homework, without preparation but in so doing, it becomes a reckless company, and recklessness would no longer make Waymo a Waymo anymore but some other companies.
Tesla implies preparation is to "game it":
“We could have done the coast-to-coast drive, but it would have required too much specialized code to effectively game it or make it somewhat brittle and that it would work for one particular route, but not the general solution. So I think we would be able to repeat it, but if it’s just not any other route, which is not really a true solution,” Musk said.
In generalization, a Tesla might choose the wrong lane to go straight or turn.
Waymo prepared its system to make sure it knows exactly how many lanes are there in that intersection and which lanes go where.
There's a GM cruise was hit when it's turning left from the middle lane or lane number 2 (second from left lane) together with the backhoe that's in lane number 1 (leftmost lane). I suspect that's the result of not doing homework with the same intensity as the way Waymo does.
Cruise car reportedly swerves in backhoe's way, is busted in SF intersection
Another way to put it is yes, a GM CEO has the ability to
tweet Hitler meme but if she exercises that ability, then her company is more like Tesla and not GM anymore.