The thinking wasn't wrong at all. It merely failed to extrapolate to what happened to the American wild west after the era of the gold rush. The vast, vast majority of humanity doesn't want to live in the wild west. And when given the option between a laissez-faire no rules world where those with better understanding of the natural rules triumph and a structured society, structure wins every time.
Nobody is really forced to use Facebook. Or Twitter. Or Google. Or Amazon. But they are, all of them, vastly more convenient than the DIY alternatives which were the only option when the internet was young.