Actually... That's because he looks like that that he was chosen as an imperial knight.
In the novel it's explained that the knights working inside the palace are all beautiful and handsome but those working outside or smth like that are well ... not as remarkable as those directly working for the imperial family.
I think it's just to show off
Palace knights are actually eye catching in general if u read novel u will notice that uke walk differently from other knights too his walk is very declate type the place his mother was from actually red district was trained to become one when he was kid if he hadn't left he would have become prostitute.
You're right
I forgot about thar toooo
Honestly idk if leaving the red district was best for the Mc (ik it was for his little sister, but he suffered a loooot after)
He would have suffered lot being prostituite old time they don't had any rights in this profession, uke did best by leaving vera even though father is neglecting type his sister wouldn't get to marry seme's cousine she would have become another victim of red light district uke by leaving vera become a honourable knight which later seme ruined but he did something which he couldn't have done in vera .. people are saying he is twink for knight but if look from perspect that kingdom which hasn't been in any war for years and soldiers haven't foot in wars it's reasonably they would look good palace knights are actually good looking.
i’m sorry but it actually bothers me how mc is drawn. you’re telling me the most respected, most qualified, and most rigorously trained imperial knight looks like a pale skinny twink?? like not even a little bit of muscle on him?? howww does that make sense