It worked with the Scottish vote. The SNP produced their very detailed document outlining how an independent Scotland would work. That provided loads of ammo for the unionists. The brexiteers produced nothing to say how life out side the EU would work so there was nothing for the remainers to point out that actually what we have at the moment is better than that.
I suppose at the time that was clever; it got the vote over the line. But as we all now know, that has caused it's own problems about "what exactly is Brexit?".