Just to be clear, I'm in an area of the world where there never was much work from home. During COVID, sure, everyone was home, but most have been back at the office for a long time. The question of trust also isn't as much of an issue, given that I'm in a country where trust is pretty much implicit. So I don't really buy into many of the especially American takes on return to office. It's not about a "return" for me, that is long gone. People returned to the office years ago.

For me it's missed opportunities for business, it's about a better work life balance, reducing stress, improving health, about reducing traffic and the associated pollution and it's about decentralization. As you rightly point out, there will be situations where you absolutely need people to go to an office, or where it will make a difference. These jobs could benefit from less traffic, better service at the edges of working hours, because the work from home people can use the time slots in middle of the day. For those jobs where it makes no difference if you are in an office or would be an improvement not to be, I don't get why more companies aren't just going for it.