Many people don't prefer remote work, and they have good reasons for it. Even ignoring all people who are impacted by factors they cannot control, some people really just don't so well in a home office environment. The routine and structure of going into the office to do work and coming home to not do work is pleasant for many people. Some folks don't have good control over their work behaviors when they're not in that environment. They thrive more in an in-person environment. I'm willing to bet that's a lot of your coworkers.
There's a good chance that you'll need a lot of stuff to support people coming back to the office if it's anything more than a small fraction. If 50% of your workforce actually prefers to come into the office every day, that's a lot of investment! I would naiively expect that to support 50% of your workforce you'd need to invest more than 50% of what you used to invest to support the in-office work environment. I'm thinking bigger firms here, the ones that actually spend a lot of money on this stuff.
And lastly I'm just not convinced that businesses actually act based solely on hard figures. The math may point towards it being advantageous to have a more remote or distributed workforce, but the world doesn't run on people following "the math". People are messy and irrational and emotional and, critically, in key leadership roles that drive what the heck their company is actually going to do. Have a handful of executives who can't wait to get back into their comfort zone - the office - and that office spending budget will find a way to get spent.