Those were all published studies. And the study you posted doesn't mean that masks are effective at preventing transmission.
The experiment was conducted by having people breath into a machine, and the masks will redirect the flow of air, but that doesn't mean they're trapping viral particles. They are just getting redirected along the seams of the mask.
Look at this demonstration of smoke being exhaled through various masks. Now imagine that smoke is full of viral particles. It's being redirected somewhat, but still getting into the air. And this is generous because virus particles are much smaller than smoke.
Explain how a mask like that is going to stop a virus particle.
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