Whether a person decides to follow public health advice and wear a mask is down to individual choice, at least in countries where wearing masks is not mandatory.
This might never be a clear-cut topic, and there may be no resolution for those who prefer to consult a large body of well-conducted scientific studies to help them make their decisions.
Some experts think that conducting randomized control studies to tease out the exact contribution that masks may make to slowing the spread of SARS-CoV-2 is likely impractical.
Some people may find wearing a mask a straightforward adjustment to their daily lives and will readily wear a mask when venturing out to crowded places, doing the groceries, or visiting friends.
For some people, such as small children and people with breathing problems, wearing a mask is not practical or possible. However, these people may still benefit if others wear them.