Sweden abandoned their laissez faire policy approach a long time ago, so I am not sure if a snippet of one day last week is an accurate measure of the effectiveness of their policy. The measure of effectiveness is excess deaths and economic damage. As far as excess deaths are concerned, Sweden ranks 44th out of 81 countries for which their is accurate data:
https://www.economist.com/graphic-detail/coronavirus-excess-deaths-tracker
Well ahead of most of Europe, and the Americas. So calling their approach a failure is incorrect. One side benefit is they may have built up more resistance to some of the later variants that posed a higher fatality risk than the original strains. Their approach wasn't perfect, but the vaccine approach isn't perfect either. Look at the nations with the highest 7-day case totals per million:
1. Maldives 20,737 (86 vaccinations per 100 residents, #20)
2. Bahrain 10,428 (94 vaccinations per 100 residents, #14)
3. Seychelles 9,869 (132 vaccinations per 100 residents, #2)
...
22. Sweden 1,700 (45 vaccinations per 100 resident, #57)
...
73. USA 530 (86 vaccinations per 100 residents, #21)
Or 7-day death totals per million:
1 Uruguay 115 (75 vaccinations per 100 residents, #26)
2 Paraguay 108 (4 vaccinations per 100 residents, #141)
3 Argentina 76 (25 vaccinations per 100 residents, #86)
...
58 USA 11 (86 vaccinations per 100 residents, #21)
...
122 Sweden 0.9 (45 vaccinations per 100 resident, #57)