Think what may well swing it is those voting out of defeatism and despair at the situation and where it is going.
Which, if it comes to pass, what a sad contrast to 2014 that at least had some possibly misplaced crazy hopefulness and flung optimism to it. Right or wrong (probably more wrong than right) there was at least a high level of positivity.
Now, there is a mood of cold hard realisation, will be a damn hard salvage what you can, but the alternative could be even bleaker. Thanks Brexit.
If only we could have forseen it coming in back then. Oh wait, we totally could have, it was already on the agenda, we just chose not to. I know I did.
That's the thing people will point to, for anyone voting on more emotional than logical grounds, is it worth the risk, etc. And they'd have a point. But who really wants to be looking back in 8-10 years again and thinking, if only we could have forseen it. Twice!