My God, you honestly do not get the concept. Yes, if you were wearing a mask that gave you 95% protection, it would in turn be excellent in protecting others from you. You are correct in that. But, but even a simple cloth mask that is extremely ineffective at keeping out virus particles and does little if anything to protect the wearer is very effective at catching expelled droplets containing the virus thus protecting others.

Once again, the main purpose of wearing a mask is not to protect the wearer, but to protect others from the wearer - regardless of the type of mask worn. Any mask is better than none for that purpose.

If you don't get that then the doorknob analogy appears to be correct in this case.