It has been found in court by expert testimony that medical grade masks worn by trained healthcare professionals were not effective at reducing transmission of respiratory viruses, how can any sane rational person then conclude cloth masks worn by the lay public wld fair better? https://twitter.com/tuns1999/status/1335358391858982913

Digging further into the ruling is interesting.
https://www.ona.org/wp-content/uploads/ona_kaplanarbitrationdecision_vaccinateormask_stmichaelsoha_20180906.pdf

"I also find that the weight of scientific evidence said to support the VOM Policy on patient safety grounds is insufficient to warrant the imposition of a mask-wearing requirement
⋮
Absent⋯the⋯patient safety⋯alleged, I conclude⋯the Policy operates to coerce immunization"

"This case was tried⋯over three⋯years⋯Volumes of scientific articles – cluster randomized controlled trials⋯observational studies, summaries, critiques, literature reviews, meta-analyses, commentaries, etc. and numerous expert reports"

"Evidence that masking as a source control results in any material reduction in transmission was scant, anecdotal, and, in the overall, lacking."

"The question⋯was whether these masks
effectively prevent influenza transmission: Are they an effective means of source
control?
This answer to this question was “*no*”

Association pointed to the report and evidence of masking expert Professor Lisa Brosseau. In her report, Professor Brosseau canvassed all of the relevant literature and wrote: “It is my opinion that the surgical mask will offer no or a very low level of protection"

she testified: “…none of the surgical masks exhibited adequate facial fit characteristics to be considered respiratory protection devices⋯surgical and procedural masks did not prevent influenza transmission by an infected person: "

"coughing, sneezing and talking produced a wide
range of particles, and in different sizes, all of which could be infectious. The smaller particles could bypass the filter, making it unlikely that a mask would lower the risk of nosocomial influenza from an infected HCW"

"Masks might prevent or impede large droplets, but that was only one of the ways in which influenza was transmitted…evidence…supported this conclusion indicating that the influenza virus can bypass/penetrate surgical masks."

"masking did not stop the spread of influenza
the Centers for Disease Control (hereafter “CDC”) observed “no studies have definitively shown that mask use by…health care personnel prevents influenza transmission….”

Here is further commentary from the court's expert witness Dr. Brosseau a national expert on respiratory protection and infectious diseases and professor (retired) of the University of Illinois at Chicago and Dr. Sietsema is also an expert on respiratory protection.

Regarding cloth or surgical masks:

There is no scientific evidence they are effective in reducing the risk of SARS-CoV-2 transmission
https://www.cidrap.umn.edu/news-perspective/2020/04/commentary-masks-all-covid-19-not-based-sound-data