Derek
You are correct but one thing I would say is this :-
CBP is the only surface where you can put this right fairly easily and cheaply by re-using the paving.
Try that with shifted/cracked concrete, flagstones, or tarmac !
A word of caution though. Hardcore is not the best sub-base. It is really only suitable as a sub-grade (under the sub-base). This is due to the unpredictability of the void size/shape between individual pieces of hardcore. As the water makes its way into those voids, then freezes and heaves, this can cause the surface to shift. It's all about the "dig" of course. You're generally better with hardcore as a sub-grade, then scalpings/MOT type 1 properly compacted, then the laying sand (sharp).