Yeah, seriously. It starts with a reworded version of “Once upon a time;” an evil wizard-knight who’s also a Lord kidnaps a princess while the princess tries to contact a good wizard-knight to help fight evil; the good wizard takes a lowly farmboy yearning for adventure under his wing and starts training him to be a knight; the pair recruit a rogue and his beastly sidekick to help them on their journey; the group infiltrates the evil castle to rescue the princess; the wizard-knights duel with swords…
…yep, no fantasy whatsoever in there.
Let’s see, Vader exhibits a total of one force power in the entire film (force choking Admiral Motti) so not really very wizard like. Princesses about in science fiction so that means nothing. So do farm boys. So those mean nothing. Ben is more mystic than magician and all he does in ANH is use a mind trick on some storm troopers twice (telepathy). Han has his origins in Northwest Smith and Hobar Mallow and space opera abouds with beastly alien creatures. And castle is your word. Fortress would be more apt - something that was very common on Buck Rogers and Flash Gordon. And bladed energy weapons appeared long before Star Wars. So everything you try to pin to fantasy is a stable of space opera.
In Foundation and Empire and Second Foundation, the Mule performs much nastier tricks, actually killing people with his mental power. I can’t even remember what all Frank Herbert had Paul do. And list is larger of space opera good guys and villains who used the same, similar, or more powerful tricks. So… the wizard aspect is pretty well entrenched in science fiction. Some even get called wizards. Telepathy and telekinesis are normal science fiction tropes, especially in space opera.