Trying to get DH a job in Ireland- we'd moved home as a trial just before the Brexit vote and it solidified the decision to stay after most of a decade in the UK, but he was able to transfer work to Northern Ireland and we were planning on continuing that indefinitely, with him earning in sterling and commuting across the border l.
Unfortunately, his income has dropped by 25% since the Brexit vote, and the risk of even greater volatility is too much for us - it is entirely possible sterling will fluctuate even more crazily around the actual leave date, so we've sadly decided the best thing to do is cut as many financial ties to the Uk as possible. Plus his current non-existent border commute may become challenging.
The thing people don't seem to realise is how many people have organised their lives in ways that makes them more exposed. I know quite a few people who commute to other European countries for work: in Northern Ireland, it's not that unusual for people to live and work different sides of the border. In London, I knew people who had spouses getting the Eurostar twice a week. Many of my friends are in sectors where there will be hiring freezes until they know which was things are going.
The point is, a rocky year or two won't cripple the country, and it may not effect the people sneering at the OP at all. But for someone who looses their job in that year, their personal finances could take such a battering they never fully recover.
Ireland is likely to be very heavily hit by Brexit - it seems our food exporting will be significantly hit. I'm thankfully not in that sector, but I am in one which could be effected by an overall economic downturn. So for now, I'm not doing much, but I am aware things could get tougher in a few years.
I think viewing Brexit as a potential risk, and then assessing what kind of a risk it poses to you, is fairly sensible. And I also think most people seem to underestimate how many people they know are likely to be directly effected.