This article is quite instructive. Many people discussing the Swedish approach described it as an experiment. The data here makes it here the experiment failed

This article is quite instructive. Many people discussing the Swedish approach described it as an experiment. The data here makes it here the experiment failed. This is the inherent problem approaches involving "best guesses" - these might well not be right. The alternative to "best guess" is "most conservative guess". In the case, the most conservative approach is doing everything you can to stop infection. This also may not be the best but it limits the downside.