And that really fits in with the more authentic Star Wars realism perspective that was prevalent before fusion and steel became re-imagined as hypermatter and neutronium in recent years.
The TPM novelization refers to Coruscant as steel alloys and glass. The ascension cables were steel-clawed. The ANH script refers to the door sealing the chasm that Luke and Leia swing over as steel. The ANH novelization refers to the Death Star exterior as steel and references its "steely horizon". The RotJ novelization refers to Boba as "steel-masked" and Luke's hand as being made of steel. The floor of the Emperor's room in the Death Star is made of steel. The Imperial shuttle has a "steely hull", and its landing ramp is described as chilly steel. The bunker corridors are made of steel. Melted steel floats amongst the debris of the final battle.
And, of course, there's the hydrofoamed permacrete and other weight-saving measures of that nature as I've mentioned before and will no doubt mention repeatedly.
These bits don't support super-dense ships, but instead point toward more readily-comprehensible densities and masses.
I'll have more on this at some point.