Your own cite says that surgical masks are ineffective but properly fitted N95 masks can be effective. I believe that they filter droplets well, e.g. from sneezing.
https://www.asahq.org/about-asa/governance-and-committees/as...
https://www.asahq.org/about-asa/governance-and-committees/as...
It's worth also noting that this refers to healthcare workers. The considerations are totally different here, because the likelihood that they'll come into close contact with an infected person is pretty close to 100%. The likelihood that a member of the public will in most Asian countries with 20 or so cases and a few tens of million people is more like 0.00001% give or take a couple of orders of magnitude.
"Most often, spread from person-to-person happens among close contacts (about 6 feet). Person-to-person spread is thought to occur mainly via respiratory droplets produced when an infected person coughs or sneezes, similar to how influenza and other respiratory pathogens spread."
https://www.cdph.ca.gov/Programs/EPO/Pages/Wildfire%20Pages/...
"An N95 respirator is particularly effective against aerosolized droplets that are invisible to the naked eye."
That's not a plausible route of transmission. The virus would be embedded in a much larger particle of human mucus, and an N95 mask will do a fine job of filtering that out.