It still is possible and likely that some individuals can and will catch COVID after being fully vaccinated- now hospitalizations will plummet but people still may get infected.
Now, this really shouldn’t be a big deal. After being fully vaccinated the chances of you being hospitalized because of COVID is around .008% and the chances of you dying of COVID is lower than that.
The problem is that over the past year due to media & politicians constant drumming of fear porn we have become an incredibly risk adverse world where ANY risk of COVID hospitalization is becoming unacceptable. In many parts of the world and even parts of the United States this will have the effect moving forward of paralyzing individuals and society through fear.
The United States is and has been lucky through our obsession with freedom, the size of our country and federalist governmental structure that politicians don’t have the will or ability to just shut down society wholesale like in many parts of the world.