yeah it probably sucks for managers to see huge parts of their jobs & supposed value-add automated away or otherwise proven unnecessary
those managers are great for a remote IC. makes my life easy so I can minimize my hours and increase my effectively hourly rate
It's also harder to get multiple "quick questions" at the same time, because in office people see when you're physically occupied. And it could be just me, but WFH I've noticed there is more psychological pressure to respond quickly to chats. Don't want people to think you're lounging off! A red "busy" indicator can mean a lot of things, in contrast to someone physically seeing you in conversation with your laptop closed in a meeting room.
In theory you should enforce boundaries "I'll respond to all questions after this virtual meeting is over" or "I have a firm cut off at 5PM and will not respond after that". But that becomes tough when leadership, who should be setting expectations on this stuff, breaks it's own rules and multi-tasks during meetings or has unrealistic availability. Definitely a cultural thing that heavily depends on your exact role and the organization norms.
TL;DR For "Zoom calls and text messaging" are not a drop in replacement for physically talking to someone, especially for people who spend a lot of their day having many small, ad-hoc conversations.
On the other hand for my partner who is non-technical and squarely in management, WFH is an endless nightmare of virtual meetings with no breaks. Hard to read people, hard to get people engaged, nonstop pings preventing what little focus time she has left. She wants to get back to an office ASAP, and I don't blame her.