Yes - no matter how actually effective the use of (surgical) masks is - it is a symbol.
You see all people around you wearing masks, you wear a mask, these simple facts act as reminder that it is a pandemy, that you have to be careful about what you do (keep distance where possible, etc.) besides wearing the mask in itself.
Soon you will see lots of other poeople around you not wearing masks and you have no way to know if they are actually vaccinated (and probably in this case you are "safe") or if they are simply not wearing the mask because they ignore the recommendation or don't believe in masks or whatever (but they are not actually vaccinated so potentially "unsafe" if they come near you).
You see all people around you wearing masks, you wear a mask, these simple facts act as reminder that it is a pandemy, that you have to be careful about what you do (keep distance where possible, etc.) besides wearing the mask in itself.
Soon you will see lots of other poeople around you not wearing masks and you have no way to know if they are actually vaccinated (and probably in this case you are "safe") or if they are simply not wearing the mask because they ignore the recommendation or don't believe in masks or whatever (but they are not actually vaccinated so potentially "unsafe" if they come near you).