Found this article, explained by experts why vaccinated ppl represent most deaths, enjoy!: https://www.kff.org/policy-watch/why-do-vaccinated-people-represent-most-covid-19-deaths-right-now/
True. More like a guideline rather than a theory. Most sources are like that. You can’t really filter out all the noises in reality unless you have a set up in a control environment. All the best!