Lockdowns only reduced Covid deaths by 0.2 per cent

"as compared to a COVID-19 policy based solely on recommendations" - what is this comparator? Sweden?

I do not think that it is possible to derive much out of just simple comparisons without taking into account cultural differences.

Have a look at this https://ourworldindata.org/explorers/coronavirus-data-explor...

If you just put these 4 countries into your data, you will get a lot of confusion. Just calculating numbers will not answer this question.

But this study will be definitely used to make unsubstantiated policy decisions.

This article is literally full of "they discounted X Y and Z" for no real reason. Closing bars and nonessential businesses reduced death rates by 10%, 86 studies were excluded, without a given reason.