Maybe you could start to learn Chinese with Taijiquan. Learn Taijiquan in Chinese (language). Not a pro of Taijiquan, but I think “form", "empty", "useless", "harmful", "shape" and "unified" has more meanings on top what you are thinking. If you want to just take the "form", not the "meaning”， that is fine too.
I guess it means, everyone can sing. (everyone could copy the form.) If you sing without the right technic, you may not able to improve, or you may hurt your vocal cord. (If you do not know the meaning of the Taijiquan, it will be "harmful and useless"). Yes, singing is singing, it is not hurting if you sing a song with poor techniques and/or no emotions.
I guess it means, everyone can sing. (everyone could copy the form.) If you sing without the right technic, you may not able to improve, or you may hurt your vocal cord. (If you do not know the meaning of the Taijiquan, it will be "harmful and useless"). Yes, singing is singing, it is not hurting if you sing a song with poor techniques and/or no emotions.