You would think that the people in charge would see that real estate is an unnecessary expense, where applicable.
Also, I've been to a lot of meetings where we were told "there are other things people value in work besides money". Maybe being able to manage your own work environment and save gas and time fits in that slot. A content, well rested workforce would be better IMO than one that's frazzled and is getting less out of their employment than they know is possible.
I'm at the age where I see Time as more valuable than anything, really.
Reading all the responses it seems there's advantages both to being at home or on site and the trick is to find the balance.