I think it's because most manufacturers realize that accessories like cords, fuses, and isolation components are personal tastes and synergy related items.
Many manufacturers use these devices when displaying their wares at shows, they have their own personal favorites. However, they are smart enough not to force their tastes on aftermarket gear that they do not manufacturer on to their customers. They allow their customers to choose these accessories to suit their own personal tastes, cutting manufacturing costs in the process.
Many manufacturers use these devices when displaying their wares at shows, they have their own personal favorites. However, they are smart enough not to force their tastes on aftermarket gear that they do not manufacturer on to their customers. They allow their customers to choose these accessories to suit their own personal tastes, cutting manufacturing costs in the process.