N95 masks block out 95% of particulate matter, like dust! They do nothing against viruses, which are orders of magnitude smaller than the air passages in the masks!
Surgical masks prevent hair and skin cells from falling into the incision! They might slow down bacteria, but they do nothing against viruses!
All this is about is appearances! It just looks like you are doing something against Covid-19, when in fact you are doing nothing!
In fact masks force the wearer to breath-in their own carbon dioxide, and they reduce the amount of oxygen you are getting, thus negatively affecting your immune system! Too much CO2 can cause hypercapnia, and too little oxygen can cause hypoxia! Most pilots have heard of hypoxia, aka altitude sickness!
In some studies 80% of health workers wearing masks have reported frequent headaches!
These airlines are run by people who don’t really care about the science, nor the health of their passengers!