with an edit...nonetheless, we are talking techniques and measures of efficacy...not fundamentals...i.e. masks or no masks...
HC professionals are actually trained on how to effectively use N95 masks, and they typically adhere to that training...the general public is unlikely to follow suit...however, even cloth masks will stop large sized 'virions', which is better than nothing at all and a step in the right direction...also, much easier for the general public to adopt...and as the MIT report noted...actually, quite effective in reducing transmission.