Earlier quoted context omitted.
Throughout history there are very few monopolies and they don't normally last that long; that is unless they get are granted special privileges by the government.
Concentration is the default in an unregulated environment. Sure pure monopolies with 100% market control are rare but concentration is rampant. A handful of companies dominating tech, airlines, banks, media.
Inequality at a point in time , and over time , is not nearly as bad if the winners keep rotating