Heck no it doesn’t. I happen to love the Euro. Being stationed in Europe, it was a pain to have to change money all the time. Now you take euro and use it everywhere. Much more convenient and in the long run cheaper.
Likewise, I am sure that tourists find it to be such a pain to travel about the North American continent and switch from Pesos to US Dollars to Canadian dollars. A unified currency, for the convenience of tourists and hang the sovereignty of the states involved, eh?