Well, you can think it's "funny" but it's not. Domestic Policies do have an impact on the economy, and there are significant differences being proposed by both the candidates, and each of those differences have real life implications on the macro economy.
Basically what you are suggesting is, "well, since Europe's economy sucks, it doesn't matter what policy is in place, because, well.... Europe"
That's an awfully naive way to see things.