The governors can issue all the edicts they want. This is what's really happening:
People packed in shoulder to shoulder with no masks: 
Kids packed in hallways shoulder to shoulder with no masks: 
You might as well point to a car accident where people who weren't wearing seat belts died as evidence that seat belts don't work. After all, click it or ticket, right? The mandate isn't what protects you; it's the act of actually doing it.
“That doesn’t say anything about the effectiveness of masks or social distancing; it says a lot about the effectiveness of mandates.”
Second highest rate of compliance (67%) in the USA, and it hasn’t worked. Even 50% compliance would create a change IF masks worked, because 50% of the people WOULD be protected. Or at least not transmitting disease. But...it didn’t do SQUAT.
If people wear seatbelts, it starts saving lives right away. Measurably. And more compliance has resulted in fewer deaths. Measurable outcomes. The more they were used, the fewer died.
Masks just make people feel good about behaving in an otherwise normal manner, which is why folks who wear masks are LESS likely to wash hands, social distance, etc. Masks are their magic talisman.
We’d be better off if folks didn’t wear masks because they would then actually practice things more likely to help - like social distancing (called “good manners” in Arizona), washing hands well when you get home, etc.