People use the results of the least effective masks to imply all masks provide minimal protection.

Yes, a bandana provides minimal effectiveness compared to an N95. It seems very easy to understand a mask designed for this purpose would perform much better than a snot rag.

A surgical type mask was never designed for this purpose either, so obviously it won't perform as well, but is better than a bandana or nothing.

This ain't hard folks, but some people make it that way.