Masks offer no or very minimal protection against infection, but they help prevent the spread from an infected person. That's always been the reason behind wearing masks. A asymptomatic person sheds less of the virus than symptomatic people, but they still shed. If an asymptomatic person wears a mask and maintains appropriate social distancing the risk they pose to others is significantly reduced. That's been the strategy from the beginning and has proven very successful on other countries.
You really need to do some research.
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Here’s another
https://www.nejm.org/doi/full/10.1056/NEJMp2006372
Masks offer no or very minimal protection against infection, but they help prevent the spread from an infected person. That's always been the reason behind wearing masks. A asymptomatic person sheds less of the virus than symptomatic people, but they still shed. If an asymptomatic person wears a mask and maintains appropriate social distancing the risk they pose to others is significantly reduced. That's been the strategy from the beginning and has proven very successful on other countries.