The rules here where I work (IT, but it's the same for other office workers): you have a maximum of 2 days / week of remote work. The rest of the time, you come into the office. Also, remote work needs to be requested in advance and needs to be approved by the team leader (pure formality). When at the office, you badge in and out using your personal badge, so it's very easy to track who's in and who's not. If the rules are not followed, you'll get a ruffle from HR.
The reasons for mandating time at the office are obvious, e.g. being available for meetings, seeing the rest of the team, so the team as such can properly work together (teams with a good routine were a key factor for keeping things running smoothly and efficiently during Covid lockdown with quasi 100% remote work, with only minimal staff on-site). We went from 100% home office during lockdown to a minimum of 2 days / week at the office and on to the current ruleset, which seems to hold for good.
I know other places around here are much more strict with remote work, where you can't change your schedule short-term, or it's only a single day of home office. I feel those employers still haven't measured the positive impacts of home office. Otoh, I don't understand this "remote only" thing that seems to be described. Apparently there's even entire recruitment processes without any physical interaction? Around here, that's pretty much unthinkable. I feel I'm blessed with the proper middle ground, best of both worlds. From the article text, it seems the author of this book also hasn't heard of "middle ground". It isn't all or nothing, or at least, it shouldn't be.