Because health workers are generally dealing with very sick people who are coughing and sneezing and bleeding and throwing up, rather than asymptomatic people for whom cloth or paper masks are utterly useless.
Glad I could clear that up for you.
LOL. Ridiculous. Do you need an analogy? Fine. Screen doors dampen sound. Just because one can still hear through them doesn't mean that some of the sounds weren't reflected off the screen. Cotton masks are not 100% effective, but they are effective. Literally, any barrier is better than no barrier. It's really simple stuff.
People should be expected to do what they can to help others. Wearing a mask helps reduce spread. Sorry if it's not 100% protection but that has never been the point. The mild discomfort some people (not all) have by wearing a mask is more than offset by the impact on disease control.
That's what Apple is doing in their stores. They can do something to reduce spread so they are doing something to reduce it. Should they close their stores? Yeah, probably. Should we all still be wearing masks even if vaccinated? Yeah probably. Why? Because wearing a mask is more protective than not wearing one. Just like it's ok to exercise and diet, or wear a condom and use birth control pills, or turn signals and hand gestures.
One can always do more. That's still an option.