Some wuxia characters are notorious "one-trick ponies": in other words, they aren't well-rounded martial artists who are highly proficient in numerous hand-to-hand, melee weapon, inner power, and lightness skills, but have that one supreme skill that evokes fear and awe in their opponents. Take away that one trick, however, and they don't have much else to back them up.
SENTIMENTAL SWORDSMAN, RUTHLESS SWORD notoriously featured two protagonists who were so characterized: Lee Chum Foon's martial arts skills outside his fearsome flying dagger skill were decent, but not extraordinary (many people could defeat LCF in hand-to-hand or sword combat). Similarly, though Ah Fei had that awesome fast sword technique, he lacked inner power, lightness skill, and even basic acupoint sealing/unsealing skills.
In Jin Yong's DEMIGOD AND SEMIDEVILS, Deun Yu was also very much like this. His Bak Ming Divine Art inner power absorption technique, Ling Bor Mei Bo lightness skill, and 6 Mak Divine Swords made him a dangerous opponent, but he did not have ANY conventional hand-to-hand or weapons skills. Like LCF and Ah Fei, if you managed to bind DY's hands behind his back (something that more well-rounded martial artists such as the Kiu Fung, the L/ROCH Greats, or Gu Long's Luk Siu Fung and Chor Lau Heung could break free of or work around), he'd be helpless.