I think there's a distinction between "soft science fiction" and "science fantasy". Soft SF still has the trappings of science fiction, with the conceit that we have figured out how to do things we don't know how to do today, while science fantasy is overtly supernatural. I mean, any definition of science fiction that doesn't include Asimov's Robot books or Foundation books needs some work.
And it's not uncommon for settings to have their feet in both soft SF and science fantasy. Star Wars, for example, has hyperdrives and actual AI, as well as magic.