I have read quite a bit about masks in the past as i lived in Asia for a few years where they are common and far better understood. The West is just getting to grips with the idea. It's fairly well known over there that they don't do anything to prevent you catching anything, and may even make it more likely because they encourage you to touch your face, but they do help in preventing you spreading what you do have. This is why surgeons wear them.
TL: DR: Are the general public using PPE to avoid extreme cases which they may find themselves in or are we actually using it because these cases occur quite frequently?
I don't fully understand your comment that masks don't prevent you from catching the disease. Respirators stop both inhalation and exhalation of particles/droplets. Surgical masks prevent exhalation of droplets and yes, they would prevent an infectious people from spreading the disease. I think what you are saying is that if everyone in the general public wore surgical masks, there is no need for respirators because there wouldn't be any droplets in the air to breathe in anyway, which I do agree with. I wasn't trying to dismiss this point in my earlier post and I am sorry if it came across that way.
The first point I tried to make was more about just how necessary is it for the entire general public to wear masks? There is already a wealth of research which shows how droplets disperse and evapourate. It isn't clear to me though why surgical masks are truly necessary in the first place. This is because I do not understand how often conditions occur where the droplets exhaled from an infected person (who is not wearing a mask) remain both suspended in the air
and do not evaporate quickly. To avoid this scenario requires the need for a mask, but the effectiveness of the masks worn by the general public then really depends on how often this scenario occurs. If the scenario hardly ever occurs, then one could argue the masks aren't really that effective at all in terms of limiting the overall spread.
As I said above, I do understand the need to err on the side of caution but we shouldn't stop studying or understanding the science.
The second main point I made was that so much emphasis is made on masks and we don't really know if they are significantly better for the general public than wearing gloves, or if it is preferable for the general public to wear both or maybe it is better for the general public to wear just gloves. It broadly follows the same argument as above. In essence are we just using PPE to avoid extreme cases or are we actually using it because these cases occur quite frequently? The science isn't clear to me here. My personal feeling is that the cases tend towards the extreme rather than the norm but its just an opinion.
I don't buy into this argument that just because Asian countries wear masks they have been significantly better off or they "better understand" them. I don't doubt it has helped, but again, there are several factors such as using apps to trace people and forced isolation. My personal opinion is that the significant reasons these countries have been better off is a lot to do with previous experience with dealing with virus outbreaks, the app which tracks users and the lockdown measures. I think in the case of the app and lockdown it has been enforced more strictly than what would probably be allowed in western cultures, I may be wrong though.