
Bitch what dafaq you mean "Why not?"
Anyone who marries this bitch is a total moron and loser.
1. ML had nothing to gain by marrying her
2. She's stupid, no brain. Lack of education
3. She's literally unfit to rule, what makes her think she can?
4. She literally burned a building TWICE WHICH LITERALLY PROVES THAT SHE'LL NEVER BE QUALIFIED

You can see the lack of education there, the ml immediately found because of the sword, her daddy was easily threatened, unknown to her that her Daddy can no longer save her sorry ass, ml can block her access to military and can even accuse her of assassination attempt when literally every single character is on his side, ml is cunning and smart, having her to marry a neighboring country's king is already a mercy.
She's a proven moron, she literally think that she can have mc kidnapped knowing full well that mc was literally trained in knighthood and knew how to fight

Rereading
I just love how everyone is wondering how Mc got a captain position in the first place.
Here is my observation, the management seemed to be bureaucratic
This is an example: if the higher ups assigned me to be the leader of a certain department, people can't have any say whether they think I'm suited or not because it is the higher ups that assigned me in that seat.
My observation is that Sabrina is more fitting as she's actually more active in managing documents and she's very perceptive but she wasn't assigned, there was a hint that Sabrina was either a lower noble's daughter or just an ordinary commoner.
My other observation is that Mc is a noble and was born from a wealthy family, he's the closest to fit in the criteria of being a captain EVEN THOUGH HE WASN'T QUALIFIED ENOUGH TO BE ONE, maybe because he's simply from a powerful noble or that he's a MAN.
Sabrina may have been able to fight her way into becoming the most suited captain but since we have no way of knowing what's like to be in their world, I can only assume that Women working in Military or any service job are still not appreciated enough to be accepted in higher position so they would rather place a unqualified person than a qualified women on position

We cannot really deduce that Sabrina would’ve been a better fit for the position as this is a smut BL and obviously were gonna see the MC is compromising positions more often then not.
I think the MC is actually very qualified for the position as he was very devoted to the job, made it through the academy (w/sabrina might I add), and he is obviously a very physically strong person.
Yeh I ain't reading, it's too bitter