I don't know if I'm oversimplifying, but for the relatively small number of countries that the Playdate is shipping to, I wonder if it would have been possible

I don't know if I'm oversimplifying, but for the relatively small number of countries that the Playdate is shipping to, I wonder if it would have been possible to hardcode the shipping rates into Shopify, and not have to use a plugin, which was one of the weak links during today's launch? Or are shipping and tax rates so complex, and there are so many different ones (depending on state/province) that it's stricly impossible to do this without a plugin?