Politician's wont say it because they would have to justify that position. Which they know isn't the case. It's effects are similar to the flu shot. In other words, no guarantee you wont catch it, transmit it, or die from it. People keep trying to compare this to the vaccines that wiped out polio or small pox. The main difference between COVID and the diseases we've eradicated with vaccines is that you can catch COVID a seemingly unlimited number of times, where as survivors of the eradicated diseases were observed to be immune. This observation is where the idea for a vaccine came from in the first place.