Why Would I?

Wynhorn's Dao was very special. Rather than relying on just her blacksmithing like Supreme Blacksmith Okie had, or just her Sword Dao like others of the swords faction, she instead relied on both in a sort of feedback loop. 

This sort of path gave her a great amount of flexibility. When her Sword Dao reached a bottleneck, she could turn to Blacksmithing. When her Blacksmithing reached a bottleneck, she could turn to her Sword Dao. And, regardless of which progressed, both would benefit. 

However, there's no such thing as a perfect path. As Wynhorn had said, she was a swordswoman before she was a Blacksmith. In this sort of situation, her sword would always take precedence over her craft. As such, there were certain things that she wouldn't be able to do.