I think they can. The thing is the corporate landlords would rather have their high rises sit empty than rent the units at reasonable rates.
Vacancy rates are well low at the moment.
There's probably also a fear that if you let a new tenant in for lower rent, this might lower the rent other people expect and the problem starts snowballing.
With commercial units (eg - downtown San Francisco) it is even harder because with remote work, the jobs are never coming back to the city.
There's a substantial cost in having a renter living there, both in dollars and risk. So if the rent isn't enough to cover those, it's cheaper to let it sit unused.
If property appreciation outpaces the gains one could make from renting it out, then it’s better to leave it empty.
It totally makes sense for the rental property owners.