R onda Rousey sits at a table in a spacious, modern kitchen, a bowl of cream of wheat reflecting in her thick-framed glasses. She feels the need to apologise for her bespectacled look; she’s been staring at a screen too long today, she explains, and our Zoom call will only extend that trend. In the background, her husband Travis walks by carrying one of their two young daughters, whisking her away so Rousey can speak without distraction. She’s sitting in a house that her MMA career built. Some would argue modern MMA is the house that Ronda Rousey built. In fairness, Rousey’s appearances on the big screen and in professional-wrestling rings helped to pay the mortgage; a cage-fighting career has never been the fairest financial endeavour. Yet Rousey was one of the trailblazers who set the precedent that the top stars, at least, can get paid something close to their worth in MMA .…