These are important to slow the spread. They may not stop is but that is no excuse to not wear a mask when inside around other people.

Just wear a mask. If you have an N95 mask then wear it as it will protect you better than a paper mask. But if someone is infected others are much better off when the infected person wears a mask. And since we don't always know if we are infected then everyone needs to wear a mask to make everyone else safer. it's simple.

Let me tell you this, You don't want to get this infection because even if you don't die you can get very sick and be affected for a long long time.