MC - best alchemist in the world? why we must care about it... MC joined one of the top sect? random outer sect elder can threaten him and even sect head can't help him. MC get super skill which allow him to escape from whenever he want, do I need to say that author never used him for second time? maybe he will use him later.
And only because she caused him to have Heart Demon. In later chapters he will visit 'space' but still return to earth to face new dangers and save whole world.