He couldn't possibly cripple his cultivation for a technique that could only be described as decent at the Innate Level.
Such an act would be as foolish as giving up a watermelon for a sesame seed.
Of course, he didn't need to cultivate the technique, but the martial principles within the "Great Leisurely Sword" were still very much worth Lu Qing's study and reference.
After all, this was the martial essence of a Martial Arts Expert's lifetime, which was still very enlightening for him.
"Previously, Master grasped some principles from carving and felt it was similar, just extracting the essence and discarding the dross.
His elder had already comprehended a complete innate domain, forming his own unique style of Martial Arts.
Just in terms of insights into the realm, he probably wasn't much different from this Martial Saint.
There's absolutely no need to follow in anyone else's footsteps.