"The study linked surgical masks with an 11% drop in risk, compared with a 5% drop for cloth."

The cloth results were statistically insignificant, meaning indistinguishable from noise. The surgical mask results barely passed the statistical significance test, but lose that significance as soon as the data are stratified by age.

On top of that, there have been numerous problems with the study that call into questions even the incredibly meager positive results it managed to show: https://www.justfactsdaily.com/famed-bangladesh-mask-study-e...

You are the one who needs to educate yourself.