I always think of driving.
In 2019 over 39, 000 people died in automobile accidents (about 1.1 deaths per every 100 miles).
If I were an "automobilologist" I could say the most effective way to prevent these deaths is to ban automobiles.
But we have to weigh things out. We think of the best way to prevent accidents within our current system (e g., traffic patterns, seat belts, etc.). On other words, how do we make it safer.
One issue is the government listened to Fauci without thinking "make it safer". They just took him at his expertise and applied it (shut down the economy, closed schools, etc.).
With Fauci, some of it is his fault because he plays politics. But to suggest he does not know about viruses and vaccines is pushing it. Fauci is well qualified.
Things change with our knowledge of any particular virus. We learn with time and suggestions change as more information is developed and as circumstances change.
Fauci gets some undeserved flack because of this. We go to a doctor who prescribes medication and monitors our condition. A couple of months later he may change the treatment because the medication is not working. Sometimes recommended surgeries do not have the desired effect. This is not because the doctor is a bad physician.
But when a doctor becomes a politician (or the medical issue becomes political) the arena changes and people forget that medicine is not an exact science. It is often reactionary. This does not mix well with politics.