I see your point. It is a feeling of thrill, in dangerous scenarios, in roleplay fantasies, or overall in relationship. You want to be in control, but she wants it too, so it leaves you both in a competition. Who's gonna be on top?
Winning this fight by showing your physical prowess has something primal to it. You secure your dominant position and prove that you can do it whenever you want, even in disadvantage. One might not believe this at first and might try to challenge you again, so you better be prepared to show their place once more.
There is also a thing about defeated partner. Some might enjoy fantasy of someone strong being defeated which leads to humiliation. But if we are talking about a romantic partner, breaking one would be a really bad idea... So I also get why you would prefer sigma female in real life. This way you can play together, exploring both sides of the spectrum without hurting each other.