Meisha Tate and Cat Zingano are both legit athletes. Meishas record speaks for itself but Cat was on a tear at the start of her UFC career and has been in the sport for close to a decade. Had it not been for Zingano's husband committing suicide she likely would have had that title shot sooner and who knows how that would have ended.
Also: 40 Boxing matches and 40 MMA matches are completely different.