Few organizations own their own office space, most lease. So it’s not so much “they”, the CEOs that want you to return to work, but “they”, the venture capitalists (whom the CEOs answer to). These investors have a stake not only in the organization, but separately have investments in commercial office real estate that they stand to lose money on if those leases aren’t renewed.
The reason CEOs want workers to Return To Office is because they want you to quit ( www.fastcompany.com )