The issue is more complex than that. Imagine you are responsible for the lives of millions of citizens. You will probably do whatever you can to minimize the risk (of transmission, severe cases, deaths).

For people in charge, the most powerful tool today is the vaccine as there is no universal 100%-efficient cure yet. They will encourage everyone to vaccinate as this is basically the only thing they can do, in spite of its efficiency being much lower than expected. The alternatives are limiting various freedoms of citizens up to extreme forms like in Australia.