I just don’t see where you come up with these falsities. Of course masks don’t prevent you from getting COVID but they do reduce the risk. So does washing your hands and distancing etc. So don’t muddy the waters.
As for infections in this delta phase, 95% of the COVID admissions to hospitals are from unvaccinated. Which probably tells us that if you have the vaccine you’re more likely to be more conscious about spreading the disease by wearing masks and socially distancing. So less likely to spread even if you have the virus. Folks who don’t heed the vaccine and mask wearing are ending up in the hospitals. The ones who are taking care are not (by and large).