He's right to a certain degree. Cris Cyborg DID test positive for steroids, a notion most of the MMA fans were certain about. She needs to get back in the cage, PED-free, prove that she is the fighter she is without enhancements. Honestly, I have no idea why Cyborg is even pushing for the fight. Eventually Ronda will have to go out and seek Cyborg, and then Cyborg will have some bargaining power.
Most of us already believe that Cyborg is the better fighter, and will beat Ronda should they fight. I think if both ladies are winning, the MMA community and internet talks will be talking about the possible matchup and that Cyborg is the better fighter. If Ronda TRULY wants to be the best female fighter, she will HAVE to challenge Cyborg for that honor.
However, I'm betting that should Ronda beat everyone (besides Cyborg) or lose to someone in consecutive bouts for the title, she will leave the sport and go off to Hollywood.