First, cultural appropriation is a white, progressive concept. It's not something generally considered /wrong/. If I wear Indian clothing in India, Arab clothing in the Middle East, or similar, that's usually viewed well in those cultures. I think part of this is why one is doing this -- there's a big difference between wearing a mockery of an Cherokee outfit for Halloween with complete ignorance of Cherokee culture, and with trying to culturally adapt out of respect for a culture. A second, much bigger piece, though, is cultural; the Western concept of identity, and the signalling mechanisms behind it, are just that: Western concepts. That doesn't mean other cultures don't have analogous concepts, but they're different in sometimes subtle and sometimes significant ways.
Second, violating a patent doesn't involve duplicating cultural or economic artefacts. If you've ever written a large program, you've probably stepped on dozens of software patents, without even knowing it.
Third, there's a difference between the general concept, and the specific mechanisms. There is nothing fundamental about inventions being protected for 20 years from the date of invention, or any of the other specifics of those mechanisms.
Fourth, a lot of this is fundamental to other forms of interchange and human interaction. If I sanction a nation from using Word, SolidWorks, Adobe CS, etc., one piece are the specific economic artefacts. The second piece is the ability to interact with all of the creative content those economic artefacts are required for. Most of these have intentionally locked-down and proprietary formats, sometimes with DRM. I feel less bad about cutting someone out of being able to use a tool I built, and more bad about cutting someone out from being able to interact with any content created with that tool. I feel especially bad about cutting people out from content they created themselves. If a country has piles of videos they created in Adobe CS which they suddenly can't use any more, that feels like overreach.
Finally, it's worth acknowledging a lot of the lead in IP came from a history of imperialism. Britain has cultural artefacts from around the world in its museums, and much of Western wealth comes from accumulated interest on plunder from around the world. It's not quite clear what a fair outcome is here.
I do feel countries should be able to make their own IP regimes.