I will extend the analogy a little further. Not everyone who eats junk food is obese and imposes costs to society as a result of that. But we don't have an administratively clean way of taxing junk food only when it is consumed by obese people. So we tax junk food generally. Similarly, administratively it works better if we incentivize vaccination generally. We've been doing this for years with children as a requirement for attending school. The military had administered a variety of vaccines for many years. None of this is new.
And all those vaccines prevent illnesses that are far worse than the CCP virus.
Once we learned that the vaccinated can spread and contract then it made the mandate movement irrelevant. Those that can't understand that are either ignorant or dishonest.