I already said that not all masks are the same.
But any mask is better than no mask. Which is what happens if you mandate a far more expensive and harder to get N95 variant.
" In theory, transmission should be reduced the most if both infected members and other contacts wear masks"
Wish you had read the studies you posted
I did actually. That line you quoted was what they (and most all of us would expect).
The data didn't prove it out though, they report this in their analysis: "We did not find evidence that surgical-type face masks are effective in reducing laboratory-confirmed influenza transmission, either when worn by infected persons (source control) or by persons in the general community to reduce their susceptibility"
Maybe these will help:
https://wwwnc.cdc.gov/eid/article/26/5/19-0994_article
https://www.acpjournals.org/doi/10.7326/M20-6817