>>13793461The vaccine does prevent transmission, just not, sadly, all of it. This is actually true of all vaccines, but it's particularly visible with Covid since it's so virulent. It's actually a 99% chance, not 99.95% chance. Scaled to population levels that's a far greater chance to die than people think, especially considering that 99% survival rate takes into account access to modern hospitals and medicine.
One of the reasons a commonly compared pandemic(1918) was so harmful was because there were no vaccines and no antibiotics or ways of prevention.