Which was highly successful, allowed for more productivity (the human species, like others, has performance gains when in comfortable and safe environments not befouled by exaggerated social animosities and fake niceties), aided those in marginalized (GSM, disabled) communities to complete work at the same level of interaction with others, and showed that most in-the-office activities are useless and hurts workers emotionally/physically.

The problem for them? They can't spy on and control your employees, which is what they want. They don't want their workers to have freedom, they want them to be slaves both in mentality and time, the most valuable aspects of our limited lives. This, with the added benefit, that anyone who doesn't "tow-the-line" will quit, reducing severance packages, etc. It's a harassment tactic to not pay out and force others to quit.

Perhaps those two should be required to be in a single office, all day, every day. Oh - that's right! They won't because it's a fucking nightmare and a waste of time, they are both paranoid messes and want to ensure they can track everything and everyone at all times. Must be great to be at the top to stifle the bottom.

tl;dr: They just want to spy on and control their employees, they know that remote working is highly effective, as they and their executive teams all do it, they just don't want others to have what used to be 'their special executive privilege'.