I dunno, I've posted two quotes from your WHO sources that are both instructions by the WHO to governments to advocate cloth mask usage to prevent transmission

I dunno, I've posted two quotes from your WHO sources that are both instructions by the WHO to governments to advocate cloth mask usage to prevent transmission of SARS-CoV-2 in community-based environments where ideal social distancing isn't possible. They do seem to be advocating it, not discouraging it. The first paper you linked to does not look at respiratory droplet transmission with a mask on. The second paper only has the abstract in English. I can't read Korean, but based on the abstract they're looking at pressure drops across a cloth filter. Again, it's not about direct filtration. It's about disrupting the stream of viral particles from one person's airway directly into another person's airway. I'm 100% open to criticism on why my model doesn't make sense, but my foundational premise is that masks function primarily by disrupting direct stream of viral particles from one person's airway to another primarily when facing each other and vocalizing. This paper shows the change in dispersion of respiratory droplets when placing a surgical mask on a coughing patient (surgical mask being very similar to the cloth masks people are using). Exhaled Air Dispersion during Coughing with and without Wearing a Surgical or N95 Mask https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3516468/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3516468/ "During normal cough, exhaled air dispersion distances along the median sagittal plane was significantly reduced to ≤ 30 cm when the HPS wore either a surgical mask or a N95 mask." Figure 3. really shows this in a graphical form. Here's another cool paper. Textile Masks and Surface Covers—A Spray Simulation Method and a “Universal Droplet Reduction Model” Against Respiratory Pandemics https://www.frontiersin.org/articles/10.3389/fmed.2020.00260/full https://www.frontiersin.org/articles/10.3389/fmed.2020.00260... "Using a bacterial-suspension spray simulation model of droplet ejection (mimicking a sneeze), we quantified the extent by which widely available clothing fabrics reduce the dispersion of droplets onto surfaces within 1.8 m, the minimum distance recommended for COVID-19 “social distancing.” All textiles reduced the number of droplets reaching surfaces, restricting their dispersion to <30 cm, when used as single layers."