Utterly Mad

I feel like this material alright but I have a few caveats. I feel like it should be extremely rare in the galaxy at large and obtaining Shroomsteel should be a quest reward someone has to work hard for. Also since only the delicious mushroom men can make it, it would only make sense that they would be the only one's to know how to fashion it into anything useful unless someone was taught the process.

Why would Shroomsteel be so rare? I can't see it being used for anything else than reflective surfaces and electronic circuitry.