Earlier quoted context omitted.
I use self made cotton mask to go for groceries. It's garbage - it doesn't fit tightly around the face and most of the air I inhale or exhale goes through the sides unobstructed. Proper masks would be nice but unavailable everywhere and of course washing hands is a must.
It's not about protecting you from other people, it's about protecting other people from you. Many people are asymptomatic or very mildly sick, yet are able to infect other people. When you cough or wipe your nose, you risk infecting other people. The cheap mask prevents you from touching your face as much and catches heavier particles that can't curve around the bends of the facemask as easily like water and mucus.
“The masks don’t do anything” story was just something floated around to prevent runs on hospital supplies. A better strategy would’ve have been to say “everyone make and wear your own masks and it will afford us some additional amount of protection.”