That’s the situation now, but after 1000 remote tech workers move there and 500 decide not to go back to the city, 100 might pivot to lifestyle startups that employ 100-200 more. And now you have a little incubator that wasn’t there before and might grow a nice little self-sustaining eco-system. And once it gets going, it can always rely on the nice geography to attract some talent, even if the cities become huge employment centers again.
In a way, I think this would be a very healthy development for these tourist towns. They are too dependent on tourism, and even when they were prosperous before Covid, they had issues with high property prices (due to empty second homes and Airbnb) and low service wages. Having a healthy middle class independent of tourism would be great for their economic stability.