The Work from Home concept differs for different industry. For instance, it works all fine for IT sector but it cannot be opted in retail sector like shops or malls. In case of a Doctor, it is a 50:50 scenario as he may advice medicine over call but has to visit a critically ill patient. Therefore, the WFH concept is not a viable option for all.
Secondly, in my opinion when a person goes to office from home, which are both safe areas, he can avoid any personal contact with other people during transit. This way he can fulfill his urgent work. Today, most of the government officials including health workers, sanitation workers, police, bankers are working to smoothly run the nation. Therefore Work From Home is neither necessary nor compulsory for everyone. It could be one of the options depending upon the nature of the industry and kind of working.