You're acting as if Star Wars only consists of the original 3 movies. Star Wars consists of 28 feature films, 12 live action series, and 33 animated series.
What's that? You aren't aware of all the Star Wars movies made between 1977 and 2055? Oh they're great! Only a small handful of them show Mos Eisley, Hoth, and Endor. Boy you should see some of the planets from the 2040's films, my personal favorite Star Wars era. Fortunately, none of the films actually show Batuu.
If Disney had made Galaxy's Edge be a planet that you'd seen before, that would be like in 1955 making the entrance to Frontierland be SPECIFICALLY Davy Crockett's Alamo rather than a generic fort, or like making Sleeping Beauty Castle look actually like the castle from the film Sleeping Beauty.
A carbon copy of Radiator Springs is a kick to visit, and fits in the vibe of DCA just fine. But Disneyland is NOT DCA. It's more amorphous, timeless and (little u) universal. Like Batuu (...as soon as they ditch the silly "We are specifically between Ep 8 and 9" requirement).