FYI - The part in the NEC which mentions no intention for the # 8 to be run to a panel board is simply stating that the bonding conductor does not have to run from a panel, then do all the bonding in an uncut run, just so it's not confused with similar bonding issues.
In other words, the #8 bond does not have to originate from any given panel board, nor is it required to be a dedicated or unspliced run from a panel board to the bonded items.
This [I believe] is to address two separate grounding issues around pools:
1: The EGC for a Pool Light is run uncut from the panel board to the fixture,
2: The bonding of stuff near the pool and the REBAR for the pool is creating an Equipotential Plane, where everything is driven to the same Potential to lower the chance of personnel getting barbequed from either a pump motor winding ground fault, or for the dare devil clowns who float 120 VAC television sets in the pool [reference to Joe's Dishwashing Detergent Bottle / Floating TV set receptacle photo - an ECN classic!].
I don't know if this helps at all.