Bold of you to assume he already doesn’t. But WFH across many industries drives down urban office space value overall.
I edited the comment to expand more clearly upon what I mean. There are other ways to capitalize on the space.
Converting office space to residential is costly (if even possible for a given building), and would require a lot of effort. There may be zoning issues in the way as well.
Much easier to just use the CEO hat to keep desks full, and the landlord hat to collect rent.