First of all, there was a Denmark study concluding that masks don't work, but it was getting censored left right and centre when it came out.
Second, the experts who say masks prevent the spread also say that is only true if you wear a medical masks that you dispose of after a shirt period of time and put on a new one and during that time do not touch the mask or your face.
If you pay attention to the people around absolutely no one is wearing it correctly! Half are wearing cloth ones, half are touching them constantly, putting around their chin and precisely zero people are changing them after a short period.
So why would I even need a study telling me masks don't work when I can see with my two eyes that people are not wearing them in the correct way that makes them work?
Are we not allowed to have opinions anymore that come from our own logic, we are only allowed to have opinions that are told to us by experts and studies? It would certainly seem so.