That's just a bizarre linkage. What have you get next for us, you are amazed at those who thought it was a good idea for United to buy back Paul Pogba didn't think about the Forth Rail Bridge disaster?
More importantly, you've just got it wrong in your interpretation about what the brexit vote was. Yes, clearly, it was going to at the very least pose questions about border arrangements - just as it was going to pose questions about much of our relationship with the rest of the world (diplomatic, economic etc). All pretty obvious. But a referendum isn't an exam paper where everyone needs to bring along their blueprints for the very things that they have no control over. People voted for/against brexit for complex reasons, on both sides. They were entirely rational reasons, reflecting their experiences over decades, their identity and all sorts of specifics. But you seem to take it that if someone didn't enter the voting booth with worked out scenarios on tax, borders or God knows what that they are idiots. Life just isn't like that - why would people have bloody worked out position papers on things that they are never consulted on and never have a say in - and still don't.
To take an example, the Northeast devolution referendum - I voted against it. I thought Labour were being cynical, detested them and thought John Prescott was a wanker - along with the fact the powers on offer were minimal. My vote was a bit of straight political schadenfreude. Does that mean I'm forever open to people whining at me for my short sightedness and making me personally responsible for the North-South divide. I'd say not. I made one of my rare forays into the voting booth (well, postal vote) and my vote represented a real thing, even if I hadn't given a moments thought to the minor representative role that some Labour hack Northeast Tzar would have wielded.
Edited: typos!