My mast is deck stepped.
So is Abracadabra.
The rigging ends at chainplates which are on either the fiberglass hull or the main bulkhead.
Well, yeah. That's pretty typical
Those plus fore and aft stays. But Abracadabra has wire running all over the place, bonding all those metal bits together.
The only electrical current running in the area of the mast is for the lights on the mast. Neither of those conductors is connected to mast or rigging.
Perhaps I misunderstood your point. I didn't mean to suggest that the mast and rigging are part of any circuits
, but only that, on many boats, they are