You and others have suggested similar theories. Other commenters mention tight production budgets or reusing set pieces.

I don’t get it though. The worn out effect is so over-dramatic and visibly noticeable on this one set/scene but not on any of the others. It’s like they played into making the galley look like a complete wreck but didn’t for the other Enterprise sets. Also the worn effect is not just one part of the galley - it’s the entire thing.