Sweden didn't close anything. Only larger events are prohibited.
Sweden is now reaping the benefits of this approach. The economy isn't as dead as everywhere else, unemployment hasn't skyrocketed and deaths are in an acceptable range.
There’s no evidence to say that herd immunity will even exist. People in Korea and China are getting reinfected.
Sweden is not as densely populated, so will obviously fair better than most EU countries. And what good is one countries economy when your import and export is fucked because the rest of the world is fucked?
Globally $7 trillion so far has been ‘pencilled’ in for stimulus in response to this in a few months. $11 trillion in QE was printed in a decade after 2008. Let that sink in.