#4 She's A Part-Timer

When it was first announced that Rousey had signed with WWE, it was reported that she had signed a full-time contract. However, her participation WWE has been anything but full-time.
Sure, unlike some of the people on the WWE roster, Ronda probably has other commitments that would get in the way of her being a full-time WWE star. It's almost like the report of her being a full-timer was put out there by WWE just so their fans wouldn't end up resenting her for being in a top spot right away.
Obviously, Rousey is better off being a part-timer, as WWE may not book her well if she was a full-time member of the roster. Sure, she's definitely more full-time than some of the company's other part-time performers, but she's not wrestling the same amount of matches that guys like AJ Styles, Roman Reigns, and Seth Rollins are.
The ex-UFC Women's Bantamweight Champion has done a few live events, but she's definitely not on the road full-time like the rest of the WWE roster is.