But on your WW2 point, I did think about it for a minute.
Britain fought WW2 for 6 years, 1939 – 1945. Brexit has no known endpoint. Imagine that even 10% of the trade impacts we've seen since the end of the transition period on 1 January persist. Then you can quite easily calculate how many years it will take to damage the economy more than WW2. Off the top of my head, I don't know if that's 6 years, or 60 years, or 600 years. But there's certainly some finite number that will do it.
It was clearly reckless to hold a vote on something without a plan on how it was actually to be implemented or even what it might look like; and there were calls for the government to do some investigation here and publish a report or some such document - the decision not to do so was in order to sow that uncertainty.
I think it would have been democratically unconscionable to not have had "No Brexit" as an option on a second referendum, but that would have required a relatively complicated ranked voting system, and arguably it would have made more sense for the first referendum to have been set up that way instead.
I suppose the alternative would have been for Remainers to boycott the hypothetical second referendum, and hope that the number of votes for the different Brexit options summed to substantially less than the number of votes for Brexit in the initial referendum.
[0] https://www.markpack.org.uk/150719/dominic-cummings-second-r...
[1] https://metro.co.uk/video/jacob-rees-mogg-suggests-holding-s...
So no plan. Genius.
There was no single, set-in-stone outcome on either side.
I voted to stay in, but the remain campaign was far from honest.
Add onto this the fact that the government wheeled out every 'expert' it could find to constantly cry about how bad brexit would be - most of them were lying (Mark Carney, George Osbourne in particular told lies of the most astounding nature - for example that brexit would cause more damage to the economy than WW2? Think about that for a minute.).
If anything the establishment was stacked against brexit.