What he is mocking is that the Edwin family and the Sword Way sect focus on the sword and only the sword. He finds the lack of variation lacking.
He can admit that swords are very powerful. This is especially so when the user of the sword has mastered the sword to the extreme.
But barring that, those who fight with swords are easy to deal with because everyone knows what they rely on and can prepare for it. They are just too straightforward in their means of attack.
That solution has been discovered to be powerful shields. The solution is simple yet effective.
Because the techniques of the Sword Way sect lack variation and adaptability, they will require overwhelming raw power in order to break harm others. And even if they manage to hurt someone, the injuries they cause will be easy to heal too.
