A vaccination also just reduces the likelihood you get covid. People can still get it and still spread it, even if they are vaccinated. It just reduces the likelihood and masks might do that as well ...
Vaccinations also have requirements with generally 90%+ protection, while masks has anything from 0 to 90% effectiveness in filtering breath emissions. As a effective measure against covid, vaccinations are a much more effective and powerful tool.
After two years and in my experience, you can't have large gatherings and expect a low risks. Neither vaccines nor mask nor the combination of both can produce enough of an defense. 2m distancing, washing hands, and keeping human gatherings inside to an absolute minimum is the only way, and then follow up with mass vaccinations. I don't think given current scientific knowledge that one can cheat that process.
It would be nice if that was true. In a small study here in Sweden they tested for covid particles in the AC system, and found particles in every single place they tested. This in a major hospital where everyone are wearing masks, and where the AC is located in the ceiling. The finding was not what the researcher was expecting, especially not in the AC system located on the roof.
How much interference a mask has is determined by the leak rating, but for most surgical masks there are no protection for the finer droplets in coughs and sneezes.
In a similar style, people though initially that bath houses and saunas would be safe against covid because the large droplets in the humid air would drop quickly to the ground. Later it was generally agreed here that the conclusion was incorrect and all public bath houses and saunas closed. Like with masks, humid air might be better than nothing but you really do not want to be near a person who are sick unless you got yourself an air filter and face shield.