I'm not underestimating humanity at all. We're talking major massive gaps in technology, that they don't even have the ability to understand what the composition of the materials are. If they had some means of equalizing technology, or a robust ability to break things down to their elemental components and a scientific background to then understand them, they could possibly get something approximating them... but like I said, they won't be able to replicate them due to the strict material and machining specifications required; only simulate with much worse copies, which Mynoghra could just wipe out, if need be.