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.
Usually it's either living with people who don't respect that you're at work even though you're at home or a company culture that doesn't know how to engage with remote workers.
Usually both.
A lot of people forget the importance of having a door to their home office, preferably one you can lock.
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.