The commenter at the top of the tree was implying a degree of unsafety in their premise that was sufficient to overpower other possible statistical causes. In the current discussion, this is a very close equivalent to stating that the vaccine caused extra deaths. To keep to the metaphor, the statement that the sun is hotter is already a huge claim in need of evidence rather than a starting premise.
If we accept that as a premise, it becomes difficult to explain why for instance the Canadian life expectancy increased in 2021 as another commenter noted, despite being society that is similar in many ways but with a higher vaccination rate.
>Terribly boring, wouldn’t you agree? But often the boring data is the correct data, or in other words: averages tend to represent a trend better than outliers.
I agree with this advice, hence the need to look at countries outside of the US and to consider the US's traditional life expectancy woes compared to other developed or OECD countries.