Funny H Man … I took the opposite approach. I've backed campaigns where the terrain was intricate. But some things cry out for simplicity. Take (for example) pipes. Love to have pipelines scatters about an industrial complex, but 3D printing the pipe is (I believe) a waste. The pipes may come out "okay" but there are cheap, perfectly round "pipes" readily available out tehre. Think anything from wooden dowels, to actual plastic pipe (for plumbing).
So having a campaign where the connectors are the piece to print, and then you cut a dowl to whatever length you want and insert that into the fixture, that is brilliant.
Printing out some thin plastic braces, that you then easily glue onto a foamcore panel, I think that is brilliant.
Sure I can cut out a door or window, but I LOVE the idea of having a door or window frame I can print out and glue in place, with all the rivets and such present. Turns a featureless, flat panel (your typical wall) into a feature rich piece of terrain.
No need to print the entire wall piece (wear and tear on the printer, and cost of filament), just print the corner reinforcement panels, a door and window frames, and you are in business.
I may ultimately get more use out of this inexpensive campaign than I will from a half dozen others I backed.
Anyway, as they say, beauty is in the eye of the beholder. I can see why this makes no sense to you. But it makes perfect sense to me.