I think part of the problem here Pat is that a voter who decided to vote remain would spend little time considering the 'what ifs' because, essentially there was going to be no change. But someone who decided to leave actually would spend time considering the wheres and why fors because it meant a change was going to come. Of course the Leave campaign pulled some pretty shoddy stunts to try to gloss over the financial risks such as the £350 million for the Nash....but I think most sentient beings saw that for what it was. Cheap grandstanding!
But WP sums it up well; 'better to be poorer and free etc'.