The virus is not airborne, meaning is not like pollen, floating aimlessly around in the air. It's only airborne when it's expelled in fluids from an infected person via something like sneezing or coughing. It needs a vehicle.
Cloth masks are generally to protect other people from your infection by inhibiting the spread. That's where the cloth masks (or scarves, I suppose) are helpful. They help stop your cough from getting on others or on things others could touch. The cloth masks don't really help you from getting infected as much because that infected cough is all over you. Sure, you might not have inhaled it but the virus is on your clothes and on the things you touch, and if you touch those things and then touch your face (to take off the mask, for example) you're at risk for infection. Cross contamination isn't really something the general public thinks about or is good at.
That's why staying home, self quarantining, and social distancing are your best bets for staying healthy, and not just with covid-19. If you have to go out (for -essential- supplies like a full grocery run, not a, oops I'm out of chocolate sauce for my ice cream grocery run) minimize contact and wash your hands when you get home. The virus needs a vehicle and a host. Don't be the vehicle or the host. #staythefuckhome