Alegrias1
At the beginning of Covid we stayed at home because we had no idea what was going to happen. It bought us time.
Now, 20 months on, if the message is still "stay at home", then something's gone badly wrong.
If someone's neighbour is stupid and ignorant, is making them stay at home going to cure their stupidity and ignorance, or is it going to entrench their ideas that the government is trying to control their lives, while making all us vaccinated people feel superior and saintly?
If you're vaccinated, you don't have the choice either about whether you infect somebody, the risk doesn't become zero.
And authoritarian measures are always brought in when we're not in "normal circumstances". Then strangely the measures never go away. 
No it does not reduce the risk to zero, just like obeying a speed limit, it does reduce the risk a great deal. If you are a responsible person you reduce the risk to others, either get vaccinated or accept the restrictions.