Well, the graphics are sufficiently visible on Blu-Ray to make it to Memory Alpha.
And the curtains of a stage are visible to the audience in the theater. That doesn't mean they're meant to be taken literally as part of the fictional world the story takes place in. They're just part of the decoration.
Movies aren't meant to be watched in freeze-frame. They're meant to be experienced viscerally in real time. Set decorations are just background texture whose purpose is to contribute to the impressions you get while watching the film live. If you later review it frame-by-frame, that's not part of the original experience that the decorations were created to serve. It's a separate exercise in analysis, tantamount to going backstage after a play and studying the backdrops and rigging.