Yeah, the idea that it’s impossible to restore the original versions is patently absurd. Movies where the negative no longer exists in any form have been restored to excellent levels of quality. There’s plenty of source material to use.
It’s not like it’s on silver nitrate or went through a fire. The archives have a bunch of material for a proper restoration. Also, it’s probably better for TESB and ROTJ than SW, from a film quality perspective.