I think peoples' issue around this has always been a complete lack of calibration in how our minds work. Its probably a bit like expecting a dog to understand how a dog thinks or vica verse. It isn't going to work.
Fishing is one for example. There is no doubt that some UK fishermen have been screwed a tad by how fishing has been negotiated over the past decades. For them, that is their most important issue because it is very literally their livelihood. They don't care about erasmus programmes or pet passports or whether a Brit can have their engineering degree recognised in France because that stuff is abstract and alien and pointless to them. For them, the ability for the UK to eventually be able to set a far more UK centric view on the fishing quotas is a net positive.
Of course, for me, as a doctor living in London who barely even touches fish, this topic could not be less important to me. For me, the status quo is more than manageable. For me, I like being able to travel to Europe visa free. I liked the idea of potentially being able to retire in France or Spain because, if I stay alive, I know that option was financially likely to be available to me. I like that my kids would have been able to exchange with their friends and colleagues across Europe. I like the very idea of the EU and what it means.
They'd probably dismiss me as a liberal metropolitan elite though and not care about my opinion and that's probably fair enough because I can't hope to have an understanding of their situation, as much as I may try to sympathise.
For them, a short to medium term general economic hit may be worth what they perceive to be other tangible benefits in their livelihood or indeed what they perceive to be a generally better path for the UK to take. Again, I'd disagree.