> This data needs to be framed against the % of the population that was vaccinated at the time they contracted the virus, right?
No, it does not.
It compares chance of you dying to covid compared to all other possible causes.
This dimensionless number does not depend on relative population sizes.
So if in one population you get 458 deaths from Covid compared to 57,263 from all other causes and in the other population you get 38,964 from covid compared to 65,170 from all other causes, we can immediately tell that one population fared much better at least when it comes to your chance to die of covid compared to chance of dying to all other causes.
Just by the fact of being in one population than in the other you get (38964/(38964+65170)) / (458/(458+57263)) ~= 47 times less chance of dying to covid assuming rates of deaths to all other causes were the same between both populations.
So what are these population? To be in the better-faring population you had to be fully vaccinated for at least 21 days and the worse population was completely unvaccinated.
Now, I am pretty sure there are other factors that factor in that number 47.
It is likely that vaccinated people treat Covid more seriously and are more likely to practice social distancing, washing hands and be generally mindful of various things you do to minimize chance of getting infected. They might also possibly wait shorter amount of time before calling for help if they see signs. While this is pure conjecture on my part I think it is reasonable to assume this happens to some extent and reduces rates of infection within vaccinated population.