Yes, let's look at the US. Despite all the bickering and backbiting and dysfunction in it, the overwhelming majority of its residents and polities do not want

Yes, let's look at the US. Despite all the bickering and backbiting and dysfunction in it, the overwhelming majority of its residents and polities do not want to see the union broken apart. The strongest argument against growth of the EU is, quite literally, inertia. It's not a perfect union, but it's much better for its participants than being marginalized outside it.