That makes as much sense as "people buy iPhones because they own Apple shares in their 401k (it's #2 in the S&P 500) and want to pump the stock". At an individual CEO level it doesn't make sense, for similar reasons. The CEO and the company can reap massive savings from not leasing an office, which is presumably also good for their careers and make the board happy. On the other hand the individual benefit that the CEO can get by ever so slightly increasing demand for CRE is negligible.