When a author/artist/filmmaker/game designer/etc. tries to create a work featuring musical instruments and they are not an experienced musician themselves, they will usually lack the knowledge necessary to correctly depict that instrument or how that instrument functions. Electric guitars are the biggest offender here, because of their popularity, association with recent popular media, and the amount of hardware that is used to make and play an electric guitar. The electric bass equivalent would probably be All Basses are Precisions (well, there's no such trope, but...).