"But Roy Rockwood, it was science fiction for the sake of science fiction"

Jack Vance's quote "However Roy Rockwood, it was science fiction for the sake of sci-fi" can be translated as a reflection on the nature and function of sci-fi literature, particularly as exhibited by the works of Roy Rockwood. Roy Rockwood was actually a pseudonym utilized by the Stratemeyer Syndicate, a publishing company known for producing series books in the late 19th and early 20th centuries, including adventure and science fiction series focused on young readers.

In Vance's quote, he compares different methods to science fiction writing. By stating "sci-fi for the sake of science fiction", Vance may be suggesting that Rockwood's stories were written primarily to amuse and stimulate the excitement and wonder of creative concepts about science and the future, rather than to delve into deeper styles or explore extensive philosophical questions. This kind of sci-fi may focus on exhilarating experiences, unique settings, and creative gizmos without necessarily going for literary depth or social commentary.

Vance, a respected science fiction author understood for his richly developed worlds and complex characters, may be highlighting a contrast in between his own nuanced technique to the category and the more uncomplicated, entertainment-focused works of authors like Rockwood. While Vance often integrated advanced themes, such as cultural constraints, philosophical self-questioning, and humanity, Rockwood's work may have centered on appealing young readers with pure experience and escapism.

Additionally, Vance's comment implies a respect for the easier, pure satisfaction that science fiction can offer. "For the sake of sci-fi" recognizes the category's roots in escapism and exploration, celebrating stories that accept the limitless possibilities of the imagination. So, Vance's reflection might be seen as a recommendation of the diverse functions and audiences in the realm of science fiction, where both thought-provoking stories and pure creative experiences have their rightful place.