“I think the point of this is that aerosol droplets can penetrate any of the common masks in use so they provide zero prevention, the exception possibly being cough/spit size droplets.”
Well, now I think that’s overstated in the other direction. Not all zero sum.
You are being told to wear the mask because it is supposed to protect you (or the other person, they cant decide which), and yet it clearly does not. Now you want to argue its XX% effective? That kind of argument can get you employment in the weather prediction business or government. People keep saying follow the science, well show us the science for Pete’s sake.