No it isn’t and that’s an over simplification of the cause of mortality. I do agree that those who refuse to mask in public are showing his/her ignorance or stubbornnes, however, they are not the cause of the death rates in the US. Look at the baseline heath status of Americans. Speaking as a medical student/health professional in Tennessee, and have a brother who is a pulmonologist/intensivist I am intimately aware of the demographics of COVID patients admitted to the ICU and/or morgue. Americans who are suffering and/or have died from COVID were overwhelmingly older and/or sick at baseline, and particularly the domino effects of obesity, hypertension, and diabetes, which is rampant. If your cardiovascular system is already compromised, your outcomes are significantly worse against a vasculopathy type disease like COVID.