The Catholic perspective is pretty clear that boys should not be engaged in fighting. Certainly that is what I was taught.
It didn't stop me of course. I got a black eye at 11 by taking on a bigger boy.
At 17 I bloodied a kid's nose who insulted my sister.
At 18 I hit a fellow in class hard enough that the blood was streaming on the floor into quite a puddle.
I received a lot of applause, and almost no punishment, for the last one.
I was lucky, because doing that was very foolish.
If I tried something like that today the injury inflicted might be very severe indeed, and I'd probably end in jail or prison.
I don't think boys need to fight. Sure, play fighting, wrestling, etc, that younger children engage in is one thing. Serious combat? No, not Catholic, Catholics are to engage in self-defense within fairly strict limits, not tempt people to anger, they are to restrain their tempers, etc.