Saying Covid response is the only thing that could possibly explain the observed differences between Sweden and (let say) Norway is simply wrong.
I do suspect Sweden would have had less fatality had they implemented a lockdown. Would it then be comparable to Norway? I wouldn't bet may life on it. France has almost twice as many covid death as Germany even though they implemented a much stricter lockdown.
It seems some people hate Sweden for choosing their way to deal with the pandemics. Could have they done better otherwise? maybe, but overall, no cataclysm happened there, they did ok in terms of fatality compared to rest of Europe, and much better for the other metrics, as stated in the article.