Sorry for the slow response.
The ONLY type of "unvaccinated" person, then, who will present himself to any health organization will be, BY DEFINITION, one who requires treatment. That skews the data on a parabolic trajectory.
Not really, because, likewise, the only vaccinated person in this study who will be counted also requires treatment.
The population being studied is those who required hospitalization.
The question is simple. Of those who required hospitalization for Covid how many were vaccinated vs. not and what’s the underlying vaccination rate in that population.
I think you might have missed the most important element:
The exact number of “vaccinated” is known, because they track those people once they’ve received the jab
The exact number of “unvaccinated” is unknown because nobody comes in and says “Hi I’m not getting the jab!”
the true rate of hospitalization would be (# of hospitalized)/total number of people, and “total number of people” of “unvaccinated” is greatly underestimated, by factors of ten most likely.