You're looking at PPE one-dimensionally. The most effective use of PPE is combined with other types of PPE, as well as additional precautions and safe habits. Masks ALONE aren't saving shit. A vaccine ALONE isn't making you infallible.
This is basic OSHA shit that everyone should at least realize where it applies to work. It carries over into your everyday. I've got a HAZWOPER certification I have to keep up every year, so it's something ingrained at this point.