It is not true that they did well economically. Here is a chart in which countries with either similiar confirmed deaths per million people or comparable economic contraction are charted.

https://ourworldindata.org/grapher/q2-gdp-growth-vs-confirme...

Sweden had horribly high number of deaths compared to others with the same or less economic contraction. Among these countries faring better than Sweden are Norway, Denmark and Finland.

Sweden did economically well compared to others with the same relative number of deaths, though. You might call it the one-eyed king in the land of the blind if you like.