Lets be clear. Your mask gives YOU a minimal amount of protection. Not enough to warrant a mandate based on that alone.
However, If you are asymptotic your mask protects ME and vice versa. If you cough or sneeze on your mask than your droplets are captured and thus not infecting those around you. This is actually why surgeons, dentists, etc wear mask. To protect you from them. That is why mask help slow the spread. There is plenty of research on this in communities with mask mandates showing reduction of new COVID cases within 5 days of the mandates going into effect.
Here is a link with more links to full studies.
Still Confused About Masks? Here’s the Science Behind How Face Masks Prevent Coronavirus
Bottom line, if you want things to get back to normal, you want the economy to recover, sports to be played? Then you need to do your part in helping slow the spread. A piece of cloth on your face is not going to hurt anything but your feelings.