In traditional Chinese culture, influenced by Confucian values, diligence (勤劳, qínláo) and hard work are held in extremely high regard. Success is seen as a direct result of effort, not just for oneself but for the honor and well-being of the entire family. Consequently, laziness is viewed as a serious character flaw, a form of irresponsibility to one's family and society. To call someone a 懒鬼 is to tap into this deep-seated cultural value. It's more than just a behavioral observation; it's a comment on their character.
While similar, 懒鬼 carries a different cultural weight.
懒鬼 is a very common, informal word. Its connotation depends heavily on the speaker's tone and their relationship with the listener.