Why Is Cultivating Immortals Unscientific?

As an immortal cultivator, Chen Yanan traveled to the world of supernatural powers, so he must have disguised himself. Practice Samadhi True Fire and pretend to be a person with fire ability; go through a thunder tribulation and pretend to be a person with thunder ability; fall in love with several girls at the same time and pretend to be a person with hypnosis ability... What do I mean by Qingmei from my previous life who taught me the exercises, and what do I mean she is about to kill me?