the Arc Way of Adaptation
2 parts Ongoing MatureJaune Arc was anything but normal jumping to one hyperfixation, breaking it down, and then optimizing it with new logic, before getting bored with it then jumping to another
But then he saw his sisters spar with his father and new ideas and inspiration flood his brain, that's how he discovered he love for fighting since no one fight would be the same
Combine that with the fact that his dream of being a hero being a Hunter is something he would be even if he had to cheat his way in
(Basically Jaune being like Isagi because I love Isagi's mindset of being death and rebirth)
(I don't own RWBY that goes to Viz Media)