Why should you wear a mask in 2021?

Since December 2019 we have been living with a Covid-19 (Coronavirus) world and the only way we survive is to wear a mask. Here are grim statistics since December 2019 there have been between 614 - 630 thousand people who have died United in the United States of America. I realize this has been the most talked-about subject from red states and blue states and it will go on as long as we have this virus. All across the global continents, this is affecting everyone and it will not go away no matter what the experts keep telling us. In Brazil, they have 556 thousand people that have died from this virus and the count will keep going up. Should everyone young and old wear a mask that is the question?. This subject is affecting everyone and it will not go away. Let me know your opinion on masks.