Can someone explain why vaccinated people are getting Covid easier if the shot works?

One of my lefty friends need to explain why it seems like vaccinated people are getting covid easier.

Lindsey Graham, Greg Abbot, the Democrats who fled Texas to hold up the vote on voting restrictions, the 27 people on a cruise ship. Donna D’Acuti, the vaccinated woman who DIED.
Can someone explain why vaccinated people are getting Covid easier if the shot works?
Can someone explain why vaccinated people are getting Covid easier if the shot works?
Post Opinion