Below the jade scrolls of the Cultivation Techniques, the names of each technique were labeled.
Earth Escape Skill!
Wood Escape Skill!
Water Escape Skill!
...
These escape techniques were considered as chicken ribs primarily because they had no real offensive power and did not greatly amplify a cultivator's cultivation.
Moreover, one needed to invest a vast amount of time to reach a profound level of mastery in these skills, but if they weren't mastered deeply, they were practically useless, so it was better not to cultivate them at all.
Take the Water Escape Skill, for instance, if only cultivated to Small Accomplishment, it was indeed hardly stronger than swimming and definitely not capable of merging with the water to flee at high speed.