But, the "magic" doesn't work 100% of the time if you don't try it.
It's why I didn't get too upset about the Ivermectin, Hydro, and other myriad of things Doctors were trying when we were in the early stages of COVID. They were trying. And, according to the study you posted; it helps when = > 70% of the population gets vaccinated. No Vaccination is 100%. We still have the flu (and its annual mutations) and some people who get their flu shots still die from the flu (100 years later). But, it's a fighting chance that's better than nothing.
Anything greater than nothing is "magic."