With the exception of N95 mask which have been professionally fitted, masks provide protection for others but very limited protection for the wearer. We knew that last March. The only way to stop or slow down an airborne epidemic without a vaccine is by putting a barrier between the carrier and others. Masks, distancing, and quarantining work well in slowing down transmission. Countries that follow the guidelines have done well. Those that haven't have done poorer.
In March there was a picture of Trump wearing a masks. However, after Redfield said they protected others not the wearer, we rarely saw Trump in a mask. I guess he though if didn't protect me, it was worthless. So many of our problems we face such as, coronavirus, poverty, homelessness, global warming, etc are due to a lack of social conciseness.
Trump and people around him are tested constantly. That's why he doesn't wear a mask. When he went to visit the VA hospital where strangers were around, he wore a mask.
We did all the things you've mentioned. I did it today. However in a free country with a Constitution, government cannot force you to act against your own will. So there will be plenty of people who don't believe in wearing a mask, consider themselves low risk due to age, or think a lot of this is BS based on the many stories out there of fudging the virus numbers.
On the other hand you see people walking or riding a bike, all alone with nobody around wearing a mask. Or they're in their car alone wearing a mask.
Look how dangerous illegal narcotics are. Do laws stop them from using these drugs? Hasn't it been amplified how dangerous they are? People still take the stupid drugs. Last year we lost over 70,000 Americans from ODs.