Honestly. It's about more than money.

If your boss says you must return to the office, after 3 years of WFH. At best, it shows that they do not value or respect you, and are just making an arbitrary decision in a bid to sell more stocks.

At worst, there might be some insidious reason to make employees physically available. Maybe they are getting a kickback somehow, or selling data that they can only get when you are there, or maybe they are just horny and want to seduce you sexually.

A remote worker is often happier, more productive, and cost less to employ even if they are paid the same as an on-site worker. Offices do not have to provide parking, seating, HVAC, power, wifi, and will even have less physical security vectors.

If some people prefer to go into an office, then it should be optional. Not a hybrid model where they force you to come a certain number of days a week.

At the end of the day unless you are on some kind of probation or evaluation period WFH should be the default when ever possible.