This is just conjecture. The vaccines were a huge success at preventing severe illness and saved millions of lives. Many people working in hospital environment

This is just conjecture. The vaccines were a huge success at preventing severe illness and saved millions of lives. Many people working in hospital environments wore N95 masks, gowns, and face shields. You might as well just say that vaccines were a failure because we could have just asked the world public to go on a diet and lose weight. It would be about as likely as getting the whole world to walk around in hazmat suits.