Masks work.
If everyone is wearing a mask, there are at least two masks between you and an infected person.
Masks don't provide 100% protection, but nothing does. However, masks are important, because they enable people to safely perform essential activities like grocery shopping, and most jobs.
We don't need to stop _every single transmission_, all that we need to do is make sure that each infected person doesn't infect more than one person on average. If each infected person infects two people, for example, that's a chain reaction of spread where everybody eventually gets the virus. However, if each person has a 50-50 chance of infecting somebody else, than over time infections will go down, and Covid will eventually be gone.
Wearing a cloth mask is not difficult, and is a very tiny tradeoff in favor of a significant decrease in transmission chance.
https://tomaspueyo.medium.com/coronavirus-the-swiss-cheese-s...
https://www.mayoclinic.org/diseases-conditions/coronavirus/i...