It’s not because of commercial real estate that offices are forcing people back.
It’s simply because managers who are in charge of making that decision prefer to be in the office.
They like everyone in the office, so they’re forcing it on everyone. Either because it makes them feel more powerful to look at all their underlings, because they enjoy working face-to-face (probably how they got high up in the company), or because they suck at their jobs and can only micro-manage by looking over people’s shoulders