But can you name an instance where a male mixed martial artists took MMA just to lose weight, and then she gets signed to fight in the UFC, and to fight for the belt?
You can't compare men's MMA to women's MMA without ignoring a few key differences. Ronda Rousey is not fighting the best of the best, she is fighting the least best of the least best because women's MMA is relatively new.
Seriously, you need to get off the high horse.
Brock Lesnar got his title shot in his 3rd fight in the UFC with a 2-1 record, coming from Pro Wrestling and less than a year of MMA training and after close to 10 years after his last amateur wrestling match.
More recently, there was Taylor Lapilus. Played soccer and was a welder, started training MMA in 2010. Fought in UFC Fight night 69 (Berlin) on June 20, 2015. No wrestling or MMA background. After 20 years of development as a sport he was signed to fight for the UFC in the men's division.
And let's be honest here, the only reason Correia got a shot was because Rousey cleaned out most of the division, Correia had a good story line, and Correia was on a 9-0 streak.
And you should look up the backgrounds of the other contenders. Correia is really the anomaly. Tate, Zingano, Davis, Nunes, Eye, Kaufman, Holm and McMann all have histories as MMA or combat sports fighters.