all masks might not filter out all particles but they filter out many/most depending on the type of mask
same reason that not everyone who wears a seatbelt or has an airbag is 100% safe in a car crash
They just lower the risk. They don't eliminate it
Masks reduce the droplet size of expelled air. That doesn't prevent transmission of a virus if a person doesn't have the virus. Asymptotic spread of Covid-19, while possible, reflects under 2% of its spread. By and large, the virus is spread by people who have symptoms.
Put another way:
Your type of thinking may cause more harm than good - because it makes people think that they are invincible because they are wearing a mask, and the focus becomes shaming perfectly healthy people who are not sick, simply for existing and breathing oxygen. Meanwhile, people with no symptoms of sickness are spreading a miniscule amount of virus, as said above.
If we bothered to look at the actual data, and stopped telling people scientifically illiterate things like "COVID doesn't discriminate", we could be telling people the truth: that COVID is 2,807 times more likely to kill someone over 80, then under 40.
Then we could target healthcare resources and other effort into protecting those actually likely to die of the virus. Instead, parroting a bunch of garbage about extremely rare "asymptotic carriers" is probably part of the reason why in Ontario, 69% of all COVID deaths were in long-term care homes alone.
Just over 90% of deaths here have been people over 70.
As of Boxing Day, 12-26-2020, there were a total of 201 people in Ontario under the age of 60, out of a population of over 11 million in that age range.
189 of those people had underlying health conditions.
So my entire province remains on mass house arrest for a virus that had killed 12 people out of almost 12 million people in that age range.
All the while, people like you emphasize wearing masks, rather than discussing this pandemic with a realistic sense of proportion to who is at risk of dying from it. This is leading to absurd levels of fear and paranoia about COVID borne on all people, when COVID is more deadly to people under 70 than the normal flu is.
By encouraging masking, you're literally creating a cult of people not focusing on what we actually do know about the virus making the mass consciousness surrounding COVID be about masks and hand sanitizing, and stressing out people at no risk of dying of the virus, when we should be focusing the overwhelming majority of our efforts helping the elderly directly. We are still treating COVID as a virus that doesn't discriminate, when very clearly, it does.
I think something like two children in Canada have died of COVID, yet we've had kids in school wearing masks rather than breathing oxygen for the past year.
I would call that child abuse. Even treasonous.
So I'd say your mask use is actually worse than useless.
Out of curiosity, has the fact that you don't personally know one single person in your age group who has died of COVID given you any pause for thought at all?