The headline of the Hollywood Reporter article is inaccurate in the first place (as the article itself says, at this point, ViacomCBS is just exploring a possible sale with the help of a commercial real estate firm).
Also, even if it does get put up for sale and then sold, that doesn't mean a new owner is going to immediately tear down all the studio facilities to build condos -- there's a big demand for studio space in L.A., and the new owner may well keep the status quo (or even expand, as at Television City).