At least we are now comfortable that there's a vaccine, better than nothing. The spread can't be controlled therefore we just have to accept it. Even a person that following safety measures got infected with the virus. But with the vaccine, it will give people confidence that even we become infected, there will be an assurance that there's a medicine for it.
If you look at other people, those thinking that there's no cure for the virus contributes on their worry resulting in their body becoming weaken too. The mindset is there that they will not be cured. If we got the virus and we know there's a vaccine for it, we will be confident and nothing to worry about that might even result into us defeating the virus alone without the vaccine.