Selling bootleg copies would still count as piracy, as would returning the game after copying it. But your point point makes sense. This device’s main focus is probably not those cases.

But emulators are a thing that we usually stress the legal use-cases when the majority use-case is piracy. So it’s kind of an area where pretense is required, and the earlier video reviewing the cartridge and this one reviewing the copying device both go out of their way to make it clear that they aren’t talking about the piracy use-case and that they still think their video will be taken down.