If it was just Star Wars, the deeper, spiritual meaning of the films (Family, redemption, forgiveness, love) would be non-existant and Star Wars would be just another brainless sci-fi shoot em up.
had push come to shove and the Undestroyed versions had never been released, at least we'd still have Luke's reunion with Han and Leia at the end of RotJ left reletively intact (admittingly, the most heartwarming part of the ending) although having to close your eyes afterwards still would detract from it.