I think it's a little arrogant to be suggesting what "the locals" should and shouldn't be concerned about. The virus doesn't care who got it first. Even if you got it from "the locals", then you can give it right back to another one of "the locals" - even if you're vaccinated (and especially if you're asymptomatic). They want to test you because they don't want more disease vectors in their land. It's their right.As a cruiser I am much more concerned about getting covid from the locals than they should be from me. If I got it, it was from them.
If you want to visit a foreign land, you kind of have to live by their rules. If you choose to stay home, then I agree that you don't have to accept anything.I don't have to accept anything.