Well, the quest idea isn't terrible, but keep in mind that we already have to quest for several of our higher end defensive nanos. I, personally, don't want to quest for another one. It's also not fair considering solders can roll for TMS. (for example) I'd settle for making NS1 shop buyable, and NS2 a quest reward, though. I think that would be fair enough.
The fact that NS is rare, in general, is a legacy thing that needs to changed. At release, it made sense that it was really rare. Now, its just another massive problem this profession has in general. I've got 3 TL 5 NT's in my org who are all facing this problem right now. They really do need it, but can't find/afford it. The rarity of the nano is hindering their gameplay. They aren't under geared either, it's simply a given that a low HP profession with no healing capability should have a survivability trump card available.
Your point of view is definitely not wrong. If anything, someone who main's an NT understands better than others. I think what is historically not understood when this topic comes up is, NS is a core part of our defensive tools, and its not easy to get.
I agree that we do need to make the profession in general more viable, but this is one tiny change request that is geared in that direction...