It's not surprising that special time hasn't been spent writing fine-grained rules about leisure boating that make everybody happy. This is a massive global crisis and it was urgent, and broad brushstrokes on a luxury pastime is no surprise.
ScottieE, I'm not sure your science and economics are sound. If we eliminate we will be visiting rest homes sooner than if we wait for herd immunity and antibody testing protocols etc etc, especially if we pace herd immunity at a speed where ICUs aren't overrun (don't understand where you got your 0.1% mortality rate - the global numbers show that to be way wrong).
Hindsight is great, but Sweden is still an experiment, and if our govt had tried it they would have been ripped apart like Boris J was when he (briefly) announced a herd immunity strategy. Also not sure why you think NZ's economy is so harmed by elimination compared to alternatives, nor why you single out just the PM as a "twit" on these points. In the days leading up to the lockdown there was heavy industry lobbying for a lockdown. Major industry and exporters wanted it. This is partly why the opposition agreed with it. Tourism and flights were collapsing whatever we did and the key was to minimise health and economic carnage elsewhere. The travelling barriers with elimination are small beer compared to the peril of having a long, slow pandemic spread through the community with business after business shut down again and again. Nail it quickly and NZ has a major competitive advantage. Hindsight or medical study will inform things for sure, but this strategy is what industry and scientists were telling the government to do loud and clear. The opposition agreed and their criticism has been on detail of implementation, not the overall plan. Most international commentators praise it. Either all of them are twits, or none, but not just the (female) politician you don't like.
We were going to have a recession the moment this blew up in the major economies. We may yet choose to take a different approach over time (you can go from lockdown to Sweden's approach but not vice versa). But I don't think there were any loud political or industry voices saying it was stupid to lock down, quite the opposite. As for mocking it as being "kind", we did what China did (locking down Wuhan) and the Chinese government will have been focused on the economy. Twits also?
Back to boating, here is a prediction: absent a vaccine, Americans will find global cruising miserable for a long time now because their approach has been terrible. Wouldn't surprise me if they (and others) face serious barriers to visiting smaller island states that can eliminate. We may just have the chance of cruising up to the islands like the old days.