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That's the point of the facemasks, to protect others. That's been known since the beginning. You wear a facemask to protect others from yourself, and in turn others wear facemasks to protect you and others themselves. Then you have a holes who are inconsiderate.
Right, viral airborne particles flouting around are capable to infect a huge number of people. If everyone has seen the results of the experiment carried out by Rich Davis, the the question of whether there is a need to buy a mask would have been cleared by itself.
How can buying and using facemasks won't help you from the coronavirus because every doctor, scientist, nurses, and other people always recommend wearing your facemasks and proper hygiene to protect yourself from the virus. The picture itself is the best proof that wearing facemasks could help you stay away from any illness and diseases.