In Shenzhen you might make hundred boards, go down to the market and buy a hundred boxes and leave them with the shipper. Boards don't work? Re-work them or make another hundred. Box doesn't work? Buy another box. You don't like your box supplier? There is a hundred others on Taobao.
In NYC it might take you weeks to do the same thing while you are bleeding rent (and everything else) so you need the thousand boards and boxes to make it work (or you are selling very few in your spare time). And if something goes wrong you are probably fucked.
There are many things that can be done, especially online. The question is if you can do it in a way that make sense. I am sure there are many people from New York on tindie. It is just hard to make it into a full time small business if you have a high cost of living and a limited supply chain.
In Shenzhen you might make hundred boards, go down to the market and buy a hundred boxes and leave them with the shipper. Boards don't work? Re-work them or make another hundred. Box doesn't work? Buy another box. You don't like your box supplier? There is a hundred others on Taobao.
In NYC it might take you weeks to do the same thing while you are bleeding rent (and everything else) so you need the thousand boards and boxes to make it work (or you are selling very few in your spare time). And if something goes wrong you are probably fucked.
I am exaggerating, but you get the idea.