I kinda suspected this, as I'd been doing certain work from home earlier – but I was always surprised to hear leadership exclaim their fears about WFH, and their suspicions of both efficiency and productivity.
The worst part is, though, that many are vying for a swift return to a traditional colocated work-place – even though they agree that the current situation works fine (pandemic, and its specifics aside). I've even heard some say it's different to actually be able to pop up and peek over their employees shoulders, to see "what they're actually doing", even in cases things are going better than planned already...