Geez, good job cutting off the CN quote to include only the part that sorta makes you look good. From that same post:
Risk of SARS-CoV-2 infection is minimal for fully vaccinated people. The risk of SARS-CoV-2 transmission from fully vaccinated people to unvaccinated people is also reduced.
Reduced, not eliminated.
Currently authorized vaccines in the United States are highly effective at protecting vaccinated people against symptomatic and severe COVID-19. Additionally, a growing body of evidence suggests that fully vaccinated people are less likely to have asymptomatic infection or transmit SARS-CoV-2 to others.
Less likely, not totally impossible.
And furthermore, this was back in May, pre-delta, which is substantially more transmissible than OG and alpha which were the dominant strains at the time.