The current Covid-19 vaccines don't reduce people's risk of infecting themselves and others by nearly enough to control Covid outbreaks, and reality doesn't care about whatever sense of justice or political viewpoint is making people believe they do anyway. There's also diminishing returns for vaccinating the remaining part of the population, since their limited effectiveness means it doesn't take particularly high vaccination levels for vaccinated people to be the main ones who're catching, spreading, and getting hospitalized with the disease.