Universal Job Change: the Weakest Job for Fighters?

This is a world where everyone changes jobs. The old order collapsed and new rules came. Facing the ravages of alien beasts, humans can only survive by becoming job-changers. Holy Priest, Shield Warrior, Berserker, Master, etc. However, when all professions were blooming, Yang Rui changed professions and became recognized as the weakest professional fighter. But... "Huh? Are fighters weak?" "Eat my Flowing Rock Shattering Fist." "A fighter is not as good as a beast?" "If I hadn't opened the ghost back, I would have almost believed it." Everyone: "God is on horseback, but the fighter is weak!" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.