Reasons that come to mind are efficiencies to be had all around. A mom can stay home and look after a kid and save on daycare, the environment benefits by reduced emissions, energy prices drop due to reduced demand, the business benefits from less toilets flushed and keurigs used, etc etc.
There are better metrics to gauge worker productivity in the modern world rather than just ensuring they're "at their desk". And I think it does a disservice to the employee, the environment, and the business and it's investors to force people back to work when many jobs have proven it isn't necessary.