Sure, a weak currency is better for basic exports. It's widely accepted that Germany prefers a weaker euro to a stronger mark. We can look at the US's behaviou

Sure, a weak currency is better for basic exports. It's widely accepted that Germany prefers a weaker euro to a stronger mark. We can look at the US's behaviour, though, to determine whether they think it's valuable to them or not. It's had every year since the petrodollar was established post WW2 to push the world towards using the Euro and instead has fiercely defended it.