Shijou Saikyou no Deshi Kenichi

I'm currently watching this anime. It's roughly translated as "History's Strongest Disciple Kenichi." It's the usual shonen anime. It's about fighting but this one is very light and really really funny. It's about Kenichi and his adventures to become a better/stronger fighter. He starts out as this really weak freshman guy but starts to progress because he is trained by 5 masters in different disciplines. It's really really fun.

My only problem with the show is the attitude of the the main character towards his obviously better fighter companion Miu. Just like Fate/Stay Night, the main character doesn't want their girl companion to fight because he believes that "girls are not suppose to fight", and would rather sacrifice himself than to let the girl fight. I'm kinda irritated with these kinds of characters. I know that some people find it romantic that he wants to protect this girl and that he's heroic that he would sacrifice himself for others but I think it's kinda stupid. There's this person who will obviously win if she fights the opponent and there's you who will probably get beaten up and die if you fight. Is it that hard of a decision?

Honestly, is it really that romantic and that heroic? Since I was a kid I was always fed with the notion that to protect a girl is romantic but isn't it kinda sexist if the girl can protect herself. It's just common sense right? Tell me what you think.