> The report states that the main factor in the problems in residential homes for the elderly was simply the fact the virus spread so widely in society.
With regards to the difference in strategy, there has been analysis like this
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7227592/
Finally, and this is just a common sense argument, I believe it is clear that avoiding social interaction will slow transmission of airborne diseases. And lockdowns decrease social interactions (to a much higher degree than simple recommendations)