I read this previously but didn't think it made sense. After a second reading, I think I'm seeing how it might decouple the value of NC to BC but it's still not crystal clear why people won't start equating NC to BC since the cost to produce becomes identical.
If I grew corn in gold plated soil, it would cost millions of dollars to produce an ear of corn. That doesn't mean that anyone's going to spend millions to buy my ear of corn.
Just because 50 NMC took just as much to mine as 50 BTC doesn't mean that anyone's willing to spend 50 BTC on 50 NMC (one domain name) - that's a ridiculous price for one domain name (and nobody uses NMC to buy anything other than domain names at this point). If you have one NMC you're going to have to sell them for a lot less than one BTC, if anyone is going to buy them from you.