"People with two doses of the vaccine will think they're invincible and start doing normal things. But since the vaccine doesn't prevent you from getting covid, it only mitigates your symptoms, people will still get covid and some will need to be hospitalized. Therefore, we need to stay locked down, wearing masks and social distancing even after we're all vaccinated."
So they’re either admitting that the vaccine doesn’t work, or it actually makes things worse.
Allow me to predict the framing.
"People with two doses of the vaccine will think they're invincible and start doing normal things. But since the vaccine doesn't prevent you from getting covid, it only mitigates your symptoms, people will still get covid and some will need to be hospitalized. Therefore, we need to stay locked down, wearing masks and social distancing even after we're all vaccinated."