DY >wait long enough and, sure, the masks will not be needed
> They were never needed for the vaccinated.
As far as we understand now (and with less understanding before) – vaccine reduces risks by a factor of 10 to 20. If you are in an area with high prevalence of COVID and you do not take other measures esp. prolonged contact without ventilation, your risk is high, and mask and SD would help. So, do not plan a visit to Indian ashram just yet.
As I mentioned above, it seems that antibody tests will soon be used to indicate whether you have even higher (or lower) level of vaccine protection, i.e. instead of having 200 mln people with 95% protection, we will be divided into 180 mln with 99+% and 20 mln with maybe 50% protection.