In case additional data helps sway minds, esp. with more contagious and virulent Delta variant spreading, this new study shows that the vaccines do significantly reduce the viral load and days of being contagious if you are vaccinated, but still get infected. So not only are you personally far less likely to have a severe illness (need for hospital) if you are vaccinated, you are also much less likely to spread it to some one who can't or won't get vaccinated. in other words, break the chain of transmission, get vaccinated.
https://www.nejm.org/doi/10.1056/NEJMoa2107058