Oh, oh, this is good question!
And actually, I think an unusual answer is:
Grocery stores kind of suck, actually. I know I'm not able to get the best need/product fit, because of all the presentation that goes into it (display case arrangement, psychology of product locations...).
You can pay the grocery store to make me think your product is better, instead of having a better product. You also have to get your product into the grocery store in the first place, which is a serious hurdle.
On the other hand, 90% of everything is crap, and you actually need special skills to navigate the free-for-all street markets... which still have a lot of the same problems.
Under such a view, it's not that NN is great, it's that everything else (that's known) is worse.
The real answer is they're really not analogous enough to compare this way, even if comparing them yields interesting thoughts.