I agree flipping the script does make it amusing, I think by definition women literally cannot rape men so again a bit of a parody.
You mentioned earlier about how people's views on things can be shaped by the literature they're into or the shows they might watch. Oda has been said to have become a fan of Game of Thrones and you can see how the idea of throne wars has spilled into his own work so maybe my supposed views on things aren't so different to his. (That's based on your assumption of me).
I think this was a theory to explain WCI. Some people thought the Wedding was inspired the red wedding and the multiple betrayals in the arc were also due to Oda liking game of thrones. But then again Oda does make sure his story is his. For example if Pudding is the little finger of one piece, there's no way in hell little finger is written to be completely redeemed because someone told them they like him. That's an entirely Oda created motivation and plot line regarding the betrayer character.
The one piece world has such a specific tone that things like Kin'emon fucking up how to read the plan is actually funny and actually a very good twist. This is literally IMPOSSIBLE in any story ive seen and that's coz there's no other story that has the very specific tone Oda has created for his.
It's the reason why game if thrones itself was sort of revolutionary because it set up this tone that actions had consequences even in medieval fantasy worlds and that's why it sucked when this tone was dropped at the end.
Oda can fuck up characters and plot lines but he's yet to break the actual tone of the story. I think Oda has a way of balancing these things. For example there is an instance of rape explicitly stated in the manga. Saint Charlos in Sabaody shoots some guy and says he's taking the guy's wife as his own. "Taking his wife as his own" is basically taking her into sexual slavery which of course includes rape and all that. But then again the tone isn't broken here since this is THE WORST OF THE WORST we are dealing with. Like it's directly put up as completely reprehensible by associating rape with Charlos specfically.
I cannot see Oda implying that kaido who we keep seeing having fun and who is obviously contrasted with Orochi so that we like Kaido more since we hate orochi. I can't see Oda breaking the tone so hard all of a sudden with this kaido having raped someone. Same goes for Doflamingo who is almost the most popular villain in the series who Oda gives an awesome some design and even sad backstory. And then he's rapist too? It's just bad tone shifts and Oda isn't bad at this sort of thing. At least not yet