How about this for an analogy for the “masks are useless” folks.
Its easy to score on an empty hockey net (your mouth and nose). Put a goalie (surgical mask) in front, there are still holes the puck (virus) can get thru, but it’s a lot harder. Put netting (n95) in front and it’s almost impossible to score.
Just because the pore size of a mask is smaller than some droplet / aerosol particles does not mean it offers no protection. Many of those particles will hit a mask fiber on the way and be stopped. They don’t steer themselves. The more layers, the higher the chance of the particle hitting a fiber. That’s why , even tho surgical and cloth masks have been shown to lower transmission in many studies, even tho the virus can be spread by aerosol or small droplets.