Might be anecdotal data, but from what I have seen, the amount of people that are working from home with proper equipment and dedicated space is really small. People work with their residential internet connection, which sometimes works well, and sometimes doesn't. They work on their kitchen counter on the 13" laptop screen on a hard stool. They work while their children are watching TV or doming homework in the same room on wednesday afternoon. They work while the maid is doing the vacuum cleaning. I could go on, but you get the idea.
If the offices where half as bad as those working conditions, there (rightfully) would be an uproar among the worker explaining how unproductive they are because of the bad conditions. But somehow all these problem magically have no effect anymore when they happen at home.
So business choose to provide a free place with premium computer screens so you can juggle all these windows, ergonomic chairs so your back won't hurt, both quiet and more social places depending on your mood, fiber internet connection with mesh wifi and redundant connection so your call don't look like a 3 FPS 640x480 GIF . And they'll ask that employees spend at least a bit of time in those.