Many still are. Your bank is still processing **** right? Your trash is still being taken away right? Your packages are still coming from every online place you order from right? Your lights are still on right? Your water still turn on? You are naive if you think all of these places are testing all of their employees every day.
Well, at least one branch of my bank has been closed. I'm pretty sure a fair number of people are still working from home too.
This isn't difficult to understand...you bring everyone back to work without massive testing, you're going to kill a lot of people, and this virus will be around for a good year and a half to two years. We have to use widespread testing to get us to the time a vaccine is approved.