The thing is they're considering Etsy as their only sales channel in this article. Anyone that does handmade goods knows that you sell a lot at fairs, conventions and events. And if you want to stick it out online, there's also Craigslist and Ebay. But it's not like Etsy is the only way to sell your goods.

If I sold cars, I'm not going to do it exclusively through autotrader.com (or one of my friends, easyautosales.com ;) ). It's as simple as not putting all your eggs in one basket.