C-3PO is an expert in human-cyborg relations. I want to know more about these cyborgs and why they’re seemingly held at arm’s length from the rest of the galaxy. Perhaps cyborgs think they’re better than the non-enhanced?
Well, in the Legends canon they were discriminated against by most people, so it could be that they generally avoid the public.
Valance the bounty hunter in the old Marvel comics kept his cyborg status a closely guarded secret. He hated his existence so much, he often paid to have someone round up derelict droids for him, so he could blast them to pieces.
Kind of interesting that Vader showed interest in him and possibly some respect, well before we knew the extent of Vader’s own injuries.