If any Google employees are reading this thread and don't agree with this move, it seems like the kind of issue that the Alphabet Workers Union would be in a perfect position to help push back on. Join up: https://alphabetworkersunion.org/
The union is probably the reason. Pretty hard to have a strong united culture when everybody is at home reading the NYT about how Google is evil.
It's easier to think of Google as good when you face your coworkers, but when they are behind avatars and just text, it's easier to fall for the propaganda of the NYT et.al
I exaggerated with the union comment, but my point was that Google is now having a very divided workforce and having them work remotely is not going to help, especially when the outside world they read (e.g. NYT) is all about blaming Big Tech for everything.