Actually I didn't miss the point if you read my first reply to the post. I suggested making it something on the order of combine the rock with clay or mud or something which could be another earth type since there is more than 1 type of planet surface and you could make say heat shield which would be good against beam weapons but not so great against projectiles/ cannons.You seem to be missing the point of this being a neat use for rocks and maybe other relatively useless blocks. It fits right along side being able to refine mineral blocks into cash items, with this we can refine planet filler blocks into cheap but heavy armor. (Already established process?)
Its a pretty nice buff to stations, and with cheap blocks to help defend them more players would be likely to build multiple stations, giving more to fight over. Far better than rocks sitting in your cargo hold collecting space dust.
I would be interested to hear how you think this would impact the game negatively other than "It hurts my realism".
You could take that further and could create silicates and make a polymer and make what amounts to teflon which would be good at slowing down projectiles which is what is used in a bullet proof vest and even armor system for vehicles. You could even simulate carbon and make a combination of carbon fiber layered with teflon covered with heat shielding to make a simply better armor.
That way you have a use for a lot more materials that we currently see as junk.
simply put take a lesson from reality. It has everything we need to explain away it accurately.