I mean, considering how cheating is rampant in CS:GO and we already got some cheaters in OW, so I don't think it has anything to do with her being a girl. I would even suggest that it might be simply PR around her, someone talked about cheating because this will grab a lot of attention.
Strong woman with pink hair and pretty face being noticed? Very good, she doesn't get enough recognition. It's only the young asian, brittish butt or blue french cleavage all the time, I'm already fed up with it.
Io gave an impassioned speech on why he should get the arcana this year, and it surely would have clinched the win for him if more people spoke chimey bell talk. (Which they do not.)
After watching her plays i'd say her excellent strategy, maneuvers and gameplay are the key factors to her success. Those cant be achieved through cheating.