I read that mathematical workout some years back. It actually stated that you could house the world's population in typical three bedroom suburban homes, with no more than three persons per house, and they'd all fit inside the state of Texas.
There's vastly more space on this planet than most people realize.
Remember the phrase “carrying capacity?” It is no longer used, along with “acid rain,” “global cooling,” “peak oil,” “resource depletion,” and numerous others. There is always a “sky is falling” meme to hype for disinformation and arouse low information peons.