Definately a case of industry pressure.
You can have a strong door with no blow-out panels which does not cause pressure problems in a decompression - a louvred or slatted door, of the same principle as the radiator grille on armoured vehicles, made of a steel frame and Kevlar slats for weight reduction, where each slat overlaps the next to provide a projectile blocking screen. A simple curtain would keep any light from the cabin out of the flight deck at night.
