Using seat belts in automobiles and wearing helmets when riding motorcycles should be the driver/rider’s choice.
And if not wearing masks only affected the person who chose not to wear them, like seat belts and helmets, I'd agree that it should just be a personal choice. Unfortunately people who choose not to wear a mask are more likely to transmit the virus to someone else than a masked person is. One person's right to swing his fist ends where another's nose begins.
Healthy people don’t need to wear masks. The efficacy of masks has not been demonstrated. In fact, negative effects that occur due to mask-wearing, such as oxygen deprivation, have been demonstrated. A nose, covered or uncovered, comes into contact with many things, good and bad, as it breathes its way through life while, hopefully, rarely encountering a fist.