Why can rockets break structures behind a wall.

[Nick/dish 2]

I find this very annoying because when I'm getting raided I not so much afraid of loosing the base (because I get raided every 30 minutes in this game no joke) I'm more afraid of loosing  structures such as my workbench, all my furnaces (that have metal and sulfur cooking),my anvil and obviously my tool cupboard.this is a problem because it takes 1 rocket to break all of these items. And a rocket can deal damage through walls. So it takes 1 rocket to break 4 furnaces which all have something cooking, 1 workbench, one anvil, and my tool cupboard.in resources I lose about 200 stone , 230 metal, 200 sulfur, 50 scrap, and 200 wood. All of this will take me a few hours to get from scratch.