Fun Fact: You can't see a virus with a normal optical microscope, no matter how powerful it is. You must use an electron scanning microscope to see a virus.
So if you can see the gaps between the threads of a mask with your naked eyes, how can you believe a mask can stop something that you need an electron microscope to see.
Isn't that like throwing sand at a cyclone fence and hoping the sand won't get through?
A great analogy that someone came up with is that the good masks (like at least the N95's and up) work like a slide. You try to throw a piece of hair down that slide and chances are, even tho the hair is a lot smaller than the slide, it will still struggle to go down that slide because of the amount of friction and stops that it has to go through with there being a miniscule chance of the hair not bumping into the slide.
Also the virus particles are found in aerosols, which are much larger and easier to trap.
Mask debate should be about personal freedoms and role of government