I don't understand the point of picking sides on whether these two women should fight.
Cyborg and Rousey have been calling out each other for years and Rousey has Dana White on her side. It is not one side being right or wrong, it is mostly the inability to compromise.
I know some say why should Rousey compromise when she is the champ?
1. Cyborg is champ as well.
Whether or not you like or respect Invicta is irrelevant. If Invicta didn't essentially sell 115 to the UFC then JJ, Thug Rose, PVZ, Carla, etc. would all be fighting for Invicta.
So if 115 is "legitimate" then 145 (Cyborg's division) is just as legitimate.
2. Since it is not disputed that both women are champions and neither wants the other's belt, have the fight at a catchweight.
3. Dana White, for what it is worth, stated that Cyborg/Rousey would do 2.5M buys.
I don't believe that number for a second, but he has stated it multiple times. So if he is so sure that card would do almost twice what UFC 100 did, then compromise.