Earlier quoted context omitted.
Etsy should charge the sellers fees per sale, and make them post an expensive bond. Then Etsy can ban drop shipping, give instant refunds, pay return postage, and generally hold the creators to high standards. Etsy should also mandate the inclusion of a scan code in the package, which the customer can use to show they received the shipment but it wasn't as advertised. This would catch people lying about the contents,…
Fun thing about a two sided marketplace. It needs two sides. If you make life hard for sellers then they won't join and then you, by definition, don't have a marketplace.
Make it too easy to sell but not have equal reduction in price penalty is how you get Etsy's current problem. Removing the dropshipped items will (hopefully) remove race-to-bottom conditions that in turn allow for small time creators to charge higher prices + profits and buyers to regain confidence that they are getting more perceived value despite the non-commodity prices. But so long as the dropshippers exist, that balance gets destroyed.