Not OP, but not everyone has an ideal environment to work from home. They might be in a small apartment with two adults trying to both get work done without disturbing the other. They might have young children that need full-time supervision.
They could leave to find a coffee shop or something similar to work from but not everyone enjoys working in that type of environment or has a job where that would be appropriate. My wife, for example, works on things that require a security clearance and are on a years long secretive development cycle. Having those conversations overheard in a public space could be problematic. By the time you get to the point of renting a workspace to get a little privacy, you might as well let your employer pay for it and go back to the office.
They could leave to find a coffee shop or something similar to work from but not everyone enjoys working in that type of environment or has a job where that would be appropriate. My wife, for example, works on things that require a security clearance and are on a years long secretive development cycle. Having those conversations overheard in a public space could be problematic. By the time you get to the point of renting a workspace to get a little privacy, you might as well let your employer pay for it and go back to the office.