You linked to advice that says:

“Generally, if you are up to date on your COVID-19 vaccinations, you do not need to wear a mask in outdoor settings. Check your local COVID-19 hospital admission level for recommendations on when to wear a mask indoors and additional precautions you can take to protect yourself from COVID-19. If you are immunocompromised or more likely to get very sick from COVID-19, learn more about how to protect yourself.”

That just isn’t the same thing as saying it’s unnecessary for vaccinated people.

Those words don’t mean the thing you say they mean.